Entries |
Document | Title | Date |
20080199017 | SPEAKER ARRAY APPARATUS AND SIGNAL PROCESSING METHOD THEREFOR - A speaker array apparatus capable of performing directivity control with ease even when sound emission is performed based on audio signals of different frequency ranges. The speaker array apparatus includes a speaker unit for emitting high-frequency range sound, and another speaker unit for emitting low- and high-frequency range sound. A signal processed by a high pass filter is used for generation of both audio signals used by these speaker units to emit the high-frequency range sounds. Since both the audio signals are rotated in phase similarly to each other, the phases of audio signals supplied to both the speaker units are in coincidence with each other in high-frequency range, which makes it easy to carry out directivity control. | 08-21-2008 |
20080212788 | Recording, Synthesis And Reproduction Of Sound Fields In An Enclosure - The invention relates to simulation of sound fields in enclosures, for instance for application in listening tests, where test subjects assess the sound quality or other sound perception characteristics of the sound field. According to a specific embodiment, the system comprises a binaural synthesis portion which synthesises sound for instance from a sound-reproduction equipment based on measured impulse responses of an actual room stored in a data base ( | 09-04-2008 |
20080226087 | Position Sensing Using Loudspeakers as Microphones - A multi-channel audio system having multiple loudspeakers is used to obtain information on the location of one or more independent noise sources within an area covered by the loudspeakers. Within the multi-channel audio system, an audio output device has an input for coupling to and receiving audio signals from one or more audio sources; an audio processing module for generating a audio drive signals and providing them on respective outputs to a number of loudspeakers. A sensing module has inputs connected to respective outputs of the audio processing module, for receiving signals corresponding to sound sensed by the loudspeakers. The sensing module includes a discriminator for discriminating between signals corresponding to the audio drive signals and sensed signals from an independent noise source within range of the loudspeakers. A position computation module determines a two or three dimensional position of each independent noise source sensed, relative to the loudspeakers. The determined positions can then be used to determine control parameters for the audio system or for other devices connected to the audio system. | 09-18-2008 |
20080226088 | Audio Transducer System - A device is arranged for driving a transducer unit ( | 09-18-2008 |
20080247556 | OBJECTIVE QUANTIFICATION OF AUDITORY SOURCE WIDTH OF A LOUDSPEAKERS-ROOM SYSTEM - A source width estimation system may estimate an auditory source width of a sound. The system detects a first frequency modulated noise signal and a second frequency modulated noise signal. The detected noise signals may be processed to obtain an average value of a lateral width of a binaural activity over time and a plurality of sub-bands. The auditory source width of the noise signals may be determined from the average value of the lateral width of the binaural activity. | 10-09-2008 |
20080260170 | Signal processing apparatus, signal processing method, and recording medium having program recorded thereon - A signal processing apparatus includes a plurality of equalizers configured to input an audio signal of a corresponding channel among audio signals of a plurality of channels and configured to perform at least gain adjustment on the basis of a set parameter, each of the equalizers being provided in such a manner as to correspond to an audio signal of one of the plurality of channels; a plurality of output sections configured to output each audio signal for each of the plurality of channels, the audio signal being processed by the equalizer; a measurement section configured to measure frequency-amplitude characteristics of the audio signal output from the output section; and a computation section configured to perform a computation process for correcting frequency-amplitude characteristics of an audio signal of each channel on the basis of the measurement result by the measurement section. | 10-23-2008 |
20080310641 | METHOD FOR CHECKING AUDIO INTERFACE IN AV SYSTEM AND APPARATUS USING THE SAME - A method for checking availability of audio interface between a display apparatus and an AV apparatus in an AV system, and an AV apparatus using the same are provided. The checking includes transmitting a command to check an audio interface to a second AV apparatus where an audio from a first AV apparatus is output, and receiving a result of checking the audio interface in response to the command from the second AV apparatus. Therefore, a user can recognize whether or not an audio interface has a problem in an AV system. | 12-18-2008 |
20080317252 | Public Address System - The invention relates to a public address system, a control unit of the public address system and a monitoring device of a public address system. A bi-directional communication with modulated data between a control device and a monitoring device and/or an end of line monitoring device is monitoring the presence and status of the loudspeaker line and loudspeakers constantly. The communication is frequency multiplexed upon the existing audio wire from the audio amplifier to the loudspeakers. In combination with the bi-directional data communication the power supply for the monitoring devices and/or the end of line monitoring devices is extracted from audio frequencies, in fact preferably a 20 kHz pilot tone generated by the audio amplifier. Filtering prevents interference between audio signals and/or communication signals and/or the power supply. | 12-25-2008 |
20090010443 | Method and Device for Determining a Room Acoustic Impulse Response in the Time Domain - Embodiments of the invention can relate to methods and devices for determining a room acoustic impulse response in a time domain. In one embodiment of a method, an acoustic input signal from an acoustic signal source is emitted into an acoustic room, an acoustic output signal is detected by an acoustic measuring device in the room and fed from the acoustic measuring device to an evaluating device and, by means of the evaluating device, from a reference signal corresponding to the acoustic input signal, and the acoustic output signal, if necessary after prior processing of the acoustic output signal, a room acoustic impulse response in the time domain of the acoustic room is calculated in real time and prepared for output in that, temporally in parallel and continuously, the acoustic input signal is emitted, the acoustic output signal is detected and, by means of the evaluating device, the room acoustic impulse response in the time domain is determined. | 01-08-2009 |
20090028348 | Headphone - A headphone that is especially useful to test the efficacy of an earplug installed in an ear canal, by using the headphone to produce sound and by sensing sound pressure at the ear drum despite the presence of the earplug. Applicant uses the speaker ( | 01-29-2009 |
20090028349 | METHOD AND APPARATUS FOR DETECTING MALFUNCTIONING SPEAKER - A method and apparatus for detecting a malfunctioning speaker are provided. The apparatus detects a speaker abnormality by identifying the state of the speaker when turning the power on or off, switching from standby mode to play mode, or performing testing. The apparatus generates an audio signal having a frequency higher than a particular frequency, outputs the audio signal to the speaker, and determines that the speaker is malfunctioning if the level of a fed-back frequency signal is lower than a reference level. If the speaker is determined to be malfunctioning, the power supply is cut and the danger of a fire starting is accordingly reduced. | 01-29-2009 |
20090028350 | METHOD AND APPARATUS FOR REDUCING RESONANCE OF LOUDSPEAKER - A method and apparatus for reducing resonance of a loudspeaker by using a model derived from a software simulated loudspeaker are provided. The method includes generating a model to determine resonance characteristics of the loudspeaker based on physical parameters of the audio reproducing device; determining accuracy of the model of the loudspeaker by comparing calculated frequency characteristics of the model of the loudspeaker and measured frequency characteristics of the loudspeaker that is outputting sound; generating a resonance reduction filter based on the model of the loudspeaker according to the determined accuracy; and reducing the resonance characteristics of the loudspeaker by applying the resonance reduction filter to input audio data. | 01-29-2009 |
20090041257 | SOUND PROCESSING UNIT, SOUND PROCESSING SYSTEM, AUDIO OUTPUT UNIT AND DISPLAY DEVICE - Practical speaker connection is identified using a device having a sound channel of a 5.1 channel or 7.1 channel, and a device is provided that can easily reproduce the optimum multiple channels. Actual speaker arrangement can be identified by, for example, measuring the impedance of a terminal at the side of an audio amplifier. If incorrect connection is found, a warning is issued. This information is transmitted to a signal source with an EDID and a signal with the optimum a number of sound channel is sent. The EDID is also used for the connection with a display unit and the speaker connection with which the display unit is provided uniquely. For example, a sound through the 7.1 channel is easily reproduced using the speaker of the display unit in the channel of the front speaker. | 02-12-2009 |
20090052680 | METHOD AND APPARATUS FOR MODELING ROOM IMPULSE RESPONSE - Disclosed are a method and apparatus for modeling a room impulse response. A method of modeling a room impulse response according to an embodiment of the invention includes receiving a sound pressure signal that is obtained by a microphone when an impulse-typed sound source is excited and detecting a room impulse response; determining boundaries between a plurality of intervals of the room impulse response such that the room impulse response is divided into the plurality of intervals on a time domain; and modeling the room impulse response using a different modeling method for each of the plurality of divided intervals. According to this invention, when a room impulse response is modeled, it is possible to decrease the number of parameters while maintaining accuracy. | 02-26-2009 |
20090060213 | Method for Determining the Position of a Moving Part in an Electroacoustic Transducer - Method and apparatus for determining a position and/or movement of a first part ( | 03-05-2009 |
20090097666 | Method and apparatus for compensating for near-field effect in speaker array system - A method and apparatus for compensating for a near-field effect in a speaker array system is provided. The method includes generating a virtual sound signal at a position, which is separated from a speaker array by a predetermined distance, based on an input sound signal, and outputting the generated virtual sound signal using the speaker array. Therefore, the near-field effect, in which a sound radiated from a speaker array is distorted to have non-uniform radiation characteristics near the speaker array, can be compensated for. Consequently, the method and apparatus can provide a stable sound field, into which non-uniform radiation characteristics uniformly converge, to a listener. | 04-16-2009 |
20090097667 | METHOD AND CIRCUIT FOR TESTING AN AUDIO HIGH-FREQUENCY LOUDSPEAKER BEING PART OF A LOUDSPEAKER SYSTEM - The present invention relates to a method and a circuit for testing a tweeter, said tweeter being part of a loudspeaker system, wherein the method includes the steps of: applying a high-frequency voltage signal to one terminal of said tweeter, said high-frequency voltage signal being generated by first electronic means; applying a constant voltage signal to the other terminal of said tweeter, said constant voltage signal being generated by second electronic means; measuring a current I | 04-16-2009 |
20090103741 | Method of correction of acoustic parameters of electro-acoustic transducers and device for its realization - The invention relates to the field of acoustics, in particular to methods and devices of correction of acoustic parameters of electro-acoustic transducers and can be applied for improvement of playback parameters of acoustic signals of various electro-acoustic transducers. The offered method of correction of acoustic parameters of electro-acoustic transducer is characteristic with determining of correction parameters of an electro-acoustic transducer by using acoustic power frequency response of electro-acoustic transducer, its evaluation is obtained by taking measurements on ambient surface of electro-acoustic transducer or its segment, measuring results are obtained from many discreet points of this surface or its segment, hereto spectrum of played acoustic test signal is being matched to the spectrum of interference at the measurement site. The device for correction of acoustic parameters of electro-acoustic transducer for the realization of the correction method is characteristic with the section for processing of measurements ( | 04-23-2009 |
20090116656 | METHOD AND APPARATUS FOR ACOUSTICS TESTING OF A PERSONAL MOBILE DEVICE - A portable handheld test fixture has an acoustic port, e.g. a speaker port, a microphone, and/or an earpiece/receiver port. Once the media device has been installed onto the test fixture, the port becomes acoustically coupled to a respective acoustic aperture of the media device that is associated with a speaker, a microphone, or an earpiece/receiver as the case may be. A sound test tool, e.g. a reference sound source and/or a sound pressure level, SPL, meter, has an input or output sound port that can be removably coupled to the acoustic port of the test fixture. Other embodiments are also described and claimed. | 05-07-2009 |
20090122998 | VENTED LOUDSPEAKER BOX SYSTEM AND ITS CONTROL METHOD - A vented loudspeaker box system comprises a vented loudspeaker box, a music content analyzing device and a bass controlling device. The vented loudspeaker box is used for playing a music signal, the music content analyzing device is used for detecting the bass contents of the music signal, and the bass controlling device is used for adjusting the bass boost frequency of the vented loudspeaker box according to the detected result. The bass boost frequency is adjusted by adjusting the length of the bass port. With the invention, the bass components at the special dominant bass frequency can be enhanced appropriately during playing the music signal through the vented loudspeaker box, and the length of bass port is matched with the dominant bass frequency of the bass components adaptively and continuously, thereby improving the bass performance of the vented loudspeaker box system remarkably. | 05-14-2009 |
20090122999 | METHOD OF IMPROVING ACOUSTIC PROPERTIES IN MUSIC REPRODUCTION APPARATUS AND RECORDING MEDIUM AND MUSIC REPRODUCTION APPARATUS SUITABLE FOR THE METHOD - A method of measuring and improving acoustic properties, and a recording medium and a music reproduction apparatus that are suitable for the method. The method includes reproducing and outputting an analysis signal stored in codec file types, recording the output analysis signal in the codec file types, obtaining an impulse response by performing convolution on the recorded signal and an inverse signal of the analysis signal, and correcting frequency properties based on the impulse response. By storing a signal that is supposed to be generated by a signal generation device in codec file types, it is possible to implement the signal in a music reproduction apparatus without a need for the signal generation device. By correcting frequency property, the music reproduction apparatus can improve the performance of an output acoustic signal close to that of an original sound. | 05-14-2009 |
20090123000 | Wearable personal sound delivery apparatus - A personal sound delivery apparatus which can be worn by a person has speakers held close to the ears and does not include any insert into the auditory canal or any ear muff that could muffle or suppress other ambient sounds. In a preferred embodiment of the invention, a wireless speaker is anchored by an arcuate hanger shaped and dimensioned to rest behind the ear. The speaker is positioned within a range from 0 to 20 centimeters (0 to 8 inches) from the auditory canal and may be surrounded by baffles that focus the incoming sound toward the entrance of the auditory canal. In other embodiments, a pair of speakers are embedded into the collar of a garment, a scapulary that rests upon the shoulders, a clamp that is bridging the nape of the neck, in pendants suspended from the neck, or hidden in a pair of earrings. | 05-14-2009 |
20090154715 | Apparati and methods for sound transduction with minimal interference from background noise and minimal local acoustic radiation - A transducer senses sounds produced by a talker or other source and measures acceleration of air. Enhancement of acceleration is accompanied by reduction of the portion of the sound energy that escapes from the regions around the transducer. The result is a high sensitivity transducer, with increased privacy for use in communication systems, especially cell phones and in a multi-person environment. A pressure sensor array with a weighted output is sensitive to sound from a source talker only, and not to acoustic background noise, and not to a local loudspeaker. The weighted signal is a source sum pressure signal. The array produces a signal (using a different weighting) that corresponds to an estimate of a derivative of pressure. The derivative signal is proportional to the volume velocity fluctuations produced by the source. This signal is enhanced, rather than reduced. A local loudspeaker is driven to make the source sum pressure signal as small as desired. The loudspeaker is driven to produce volume velocity fluctuations approximately equal and opposite to those produced by the source. No compression of air arises due to the talker, and no sound is radiated into the far field. All happens because the system is driven to reduce the source pressure sum signal to below a desired threshold. It is not necessary to directly measure the volume velocity fluctuations of the talker source. | 06-18-2009 |
20090169025 | METHOD FOR ADJUSTING FREQUENCY RESPONSE CURVE OF SPEAKER - A method for adjusting frequency response curve of a speaker comprises these steps: testing sensitivity of the speaker in at least two types of hardware conditions and recording corresponding frequency response curves; selecting a frequency response curve that comes closest to falling within a predetermined range for selected frequency ranges; and adjusting the selected frequency response curve with a filter. | 07-02-2009 |
20090180632 | Method and Apparatus in an Audio System - A method and apparatus in a sound-reproduction system, in which method an electrical calibration signal is formed, an audio signal is formed in the loudspeaker from the calibration signal, the response of the audio signal is measured and analysed, and the loudspeaker system is adjusted on the basis of the measurement results. The operator is permitted to made additional alterations to the settings of the loudspeaker system on the basis of the measurement performed, the effects of the alterations are calculated and displayed to the operator without additional measurements, and the additional settings are implemented in real time in the loudspeaker system. | 07-16-2009 |
20090202083 | ELECTRO-MECHANICAL TRANSDUCER AND MANUFACTURING METHOD OF THE SAME - A microphone-capsule includes a vibrator implemented by a conductor having a flat vibration surface, a dielectric-polarization plate that is defined by a flat first principal surface facing the vibration surface of the vibrating plate and a second principal surface facing parallel to the first principal surface and in which polarization directions are aligned, a back electrode joined to the second principal surface of the dielectric-polarization plate, and an induced-charge measuring unit configured to measure the charges induced between the vibrating plate and the back electrode, in association with the displacement of the vibration surface. The induced-charge measuring unit includes an amplifier connected to the back electrode and an output circuit connected to the amplifier. | 08-13-2009 |
20090214047 | System for producing the parameters of a bass-enhanced loudspeaker enclosure - A system for producing parameters for a bass-enhanced loudspeaker enclosure; meanwhile, a low-frequency extended frequency, a quality and quantity ratio and radius of a port need to be defined for the system. Also, the resonance frequency of a mechanical system and the quality and quantity of a mechanical system are fixed to obtain the parameters for the frequency ratio, the length of the duct and the cavity volume inside the device, etc. and to manufacture the bass-enhanced loudspeaker enclosure. | 08-27-2009 |
20090220098 | ADAPTIVE BASS MANAGEMENT - The invention relates to a method for adapting sound pressure levels in at least one listening location, the sound pressure being generated by a first and a second loudspeaker, each loudspeaker having a supply channel arranged upstream thereto, where at least the supply channel of the second loudspeaker modifies the phase of an audio signal transmitted therethrough according to a phase function. The method includes supplying an audio signal to the supply channels and thus generating an acoustic sound signal; measuring the acoustic sound signal at each listening location and providing corresponding electrical signals representing the measured acoustic sound signal; estimating updated transfer characteristics for each pair of loudspeaker and listening location; calculating an optimum offset phase function based on a mathematical model using the estimated transfer characteristics; updating the phase function by superposing the optimal offset phase function thereto. | 09-03-2009 |
20090220099 | METHOD AND APPARATUS FOR OBJECTIVE ASSESSMENT OF IN-EAR DEVICE ACOUSTICAL PERFORMANCE - A method and apparatus for objectively assessing acoustical performance of an in-ear device having a passageway extending there through use a dual microphone probe that removably engages the passageway. The acoustical performance of the in-ear device is performed with the in-ear device inserted into the ear canal of the user and a reference sound source. A clip holding the probe in an acoustic near field of the sound source permits real time calibration thereof. The method and apparatus allow on-site and in-situ measurement of a predicted personal attenuation rating of the device, a subject-fit re-insertion test, an acoustic seal test, a rating test, a stability and reliability test, as well as a protection test of the device with an assessment of a filtered predicted exposure level at the ear for a specific noise exposure level. The apparatus may be simply housed along with the sound source for in-field evaluation tests. | 09-03-2009 |
20090274313 | Slotted Waveguide Acoustic Output Device and Method - The present application is directed to an omnidirectional sound emitting device comprising an acoustic slotted waveguide array; and an acoustic source in communication with the acoustic slotted waveguide array. The device is configured to project an acoustic beam at distance up to about two nautical miles or more. | 11-05-2009 |
20090304193 | Devices and Methods for Testing the Operability of Audio Speakers - A device for testing the operability of an audio speaker includes a housing, a unidirectional microphone and a display. The underside of the housing comprises a recessed area. The unidirectional microphone is positioned and oriented in the recessed area such that the unidirectional microphone is recessed from the underside of the housing. The display is positioned on the housing such that the display is visible when the testing device is placed proximate an audio speaker with the underside of the housing facing the audio speaker. The display may include at least one visual indicator operatively coupled to the unidirectional microphone such that, when the unidirectional microphone is receiving an acoustic signal, the at least one visual indicator is illuminated. | 12-10-2009 |
20090304194 | Identification Method and Apparatus in an Audio System - An identification method and apparatus in a sound-reproduction system, in which an electrical calibration signal is created, an audio signal is created in the loudspeaker from the calibration signal, the response of the audio signal is measured and analysed, and the system is adjusted on the basis of the measurement results. A light signal is created in the loudspeaker with the aid of a centralized control system, in order to indicate visually the loudspeaker that is the subject of the calibration. | 12-10-2009 |
20090304195 | METHOD AND DEVICE FOR DIAGNOSING THE OPERATING STATE OF A SOUND SYSTEM - The invention relates to a method of diagnosing the operating state, in situ, of a sound system comprising at least one loudspeaker suitable for being connected to an audio player and arranged in an at least partially closed space, characterized in that it comprises the following steps:
| 12-10-2009 |
20090316920 | SPEAKER DEVICE - A speaker device includes a cabinet, a speaker unit, a port, a cartridge, and an adsorbent material. The adsorbent material is disposed in the interior of the cartridge. The cartridge is a container removable from the cabinet. When the adsorbent material is deteriorated, the cartridge is replaced or the adsorbent material is reactivated, thereby making it possible to maintain, over a long period of time, the effect of physical adsorption provided by the adsorbent material. | 12-24-2009 |
20090323974 | SYSTEM AND METHOD FOR TESTING AUDIO DEVICE OF MOTHERBOARD - A system for testing audio of a motherboard includes a recording fixture and a computer. The recording fixture includes a recording device and a soundproof device. The soundproof device is configured for soundproofing the audio device and the recording device from environmental noise. The computer includes an output/input module, a comparing module and a displaying module. The output/input module is configured for outputting a first sound signal generated by the computer to the audio device to cause the audio device to generate a sound and receiving the sound generated by the audio device and recorded by the recording device from the recording device and transforming the sound into a second sound signal. The comparing module is configured for comparing the first and second sound signals. The displaying module is configured for displaying the compared result. | 12-31-2009 |
20100002889 | SYSTEM AND METHOD FOR DESIGNING SOUND SYSTEMS - The invention is directed to a display and method for conducting sound system design. The display is configured to simultaneously show a sound system model comprising both audio components and sound environment components, a plurality of parameters and a graphic representation of a calculated sound system performance attribute. In response to receiving input from the user and without any additional user intervention, the display re-displays a newly-calculated sound system performance attribute such as, for example, a graphic representation in the sound system model of a sound path associated with a user-selected reflected sound identifier. A processor also simulates, based on the sound system configuration, the sound performance that a user would expect to hear positioned in an identified listening position of the sound system model. | 01-07-2010 |
20100046766 | ADJUSTMENT OF ACOUSTIC PROPERTIES BASED ON PROXIMITY DETECTION - One or more acoustic transducers of a device may be adjusted based on automatic detection of device proximity to the user. In a mobile telephone, when the user is using the receiver and holding the telephone against his/her ear, if the telephone detects that the user has moved the telephone further from his/her ear, the telephone will raise the receiver volume. Similarly, if the user is using the speaker, the telephone will adjust the speaker volume as user distance from the telephone changes. In another embodiment the telephone may fade between the receiver and the speaker. Volume is not the only acoustic property that could be adjusted according to user proximity. Frequency response is another property that could be adjusted, such as using appropriate electronic filtering, or by turning on another transducer that is not otherwise being used. | 02-25-2010 |
20100046767 | Wireless Headset Noise Exposure Dosimeter - Systems and methods for measuring noise exposure associated with use of a wireless headset are presented. In one example, a transition from a wireless headset standby mode operation to a wireless headset active mode operation is identified. A stored noise dose measurement at the wireless headset is recalled, and a current noise dose measurement is calculated at the wireless headset for a duration of the active mode operation. A transition from the wireless headset active mode operation to the wireless headset standby mode operation is identified, and an updated noise dose measurement is recorded at the wireless headset. | 02-25-2010 |
20100061561 | METHOD FOR PERFORMANCE MEASUREMENT AND OPTIMIZATION OF SOUND SYSTEMS USING A SLIDING BAND INTEGRATION CURVE - A method for performance measurement and optimization of sound systems using electroacoustic measurements and a sliding band integration curve. Nearfield and spatially and temporally averaged broadband farfield responses are measured, averaged over a distinct set of frequencies, level matched, and weighted using a frequency-dependent ratio. The two curves are then combined to produce a third curve. The results indicate system performance in a listening space that matches human sensory response and provides means to optimize the sound system for the listening space. | 03-11-2010 |
20100098261 | ARRANGEMENT AND METHOD FOR DETERMINING OPERATIONAL MODE OF A COMMUNICATION DEVICE - A wireless electronic arrangement configured to connect to an earphone arrangement may include a signal generator to generate an electric signal to be sent over the earphone arrangement; a measuring arrangement to make at least one measurement of the electric signal to determine a value indicating a current acoustic impedance of the earphone arrangement; a control unit to compare the determined value with a stored value indicating an operational acoustic impedance stored on a memory unit and, based on a result of the comparison, to select an operational mode of the wireless electronic arrangement based on the determined state of the earphone arrangement. | 04-22-2010 |
20100104108 | HIGH INTENSITY CALIBRATION DEVICE - A calibration device for calibrating a dynamic pressure sensor includes a power/control box and a portable calibration head disposed in electrical communication with the power/control box. The portable calibration head may include a calibration head housing having a housing opening and a speaker provided in the calibration head housing and communicating with the housing opening. The power/control box may be configured to induce emission of an acoustic calibration signal from the speaker of the calibration head. | 04-29-2010 |
20100135503 | METHOD AND APPARATUS FOR CONTROLLING DIRECTIONAL SOUND SOURCES BASED ON LISTENING AREA - Sound can be listened to only in a listening area by maximizing a sound energy difference between a listening area and a non-listening area while maximizing sound radiation efficiency of each sound source. Accordingly, realistic sound can be provided to listeners without causing auditory disturbance to third parties, and maximal sound effects can be obtained with only minimal control. | 06-03-2010 |
20100150361 | APPARATUS AND METHOD OF PROCESSING SOUND - A technology for controlling acoustic energy distribution in a control region is provided. A sound processing apparatus includes a control filter such that a controllable sound zone is formed in the control region, and the sound processing apparatus synthesizes the control filter and an input signal to transfer sound to a desired location or a specific user. The numbers, the size and the locating positions of the sound zone and/or the control region may be controlled. | 06-17-2010 |
20100202624 | Equipment, method and use of the equipment in an audio system - A method and means for a sound-reproduction system. The means include a first opening arrangement for a microphone, and a second opening arrangement for a microphone stand, formed in an essentially planar elastic material. | 08-12-2010 |
20100208905 | DEVICE AND A METHOD FOR DETERMINING A COMPONENT SIGNAL WITH HIGH ACCURACY - A device for determining a component signal for a WFS system includes a provider for providing WFS parameters, a WFS parameter interpolator, and an audio signal processor. The provider provides WFS parameters for a component signal while using a source position and while using the loudspeaker position at a parameter sampling frequency smaller than the audio sampling frequency. The WFS parameter interpolator interpolates the WFS parameters so as to produce interpolated WFS parameters which are present at a parameter interpolation frequency that is higher than the parameter sampling frequency, the interpolated WFS parameters having interpolated fractions which have a higher level of accuracy than is specified by the audio sampling frequency. The audio signal processor is configured to apply the interpolated fractional values to the audio signal such that the component signal is obtained in a state of having been processed at the higher level of accuracy. | 08-19-2010 |
20100220865 | METHOD AND SYSTEM FOR CONTROLLING A MAXIMUM SIGNAL LEVEL OUTPUT TO HEADPHONES COUPLED TO A WIRELESS DEVICE - A method for controlling a maximum signal level output to headphones of a wireless device is provided. The method includes: determining an impedance of the headphones; determining a carrier specific maximum signal level for headphones having the impedance; and, adjusting an audio amplifier of the wireless device coupled to the headphones to restrict the maximum signal level output to the headphones to the carrier specific maximum signal level. | 09-02-2010 |
20100232610 | Acoustic Design Support Apparatus - In an acoustic design support apparatus, a speaker selection supporter selects a desired speaker as a candidate for use in a given space based on shape information representing a shape of the space. A speaker mounting angle optimizer calculates an optimal mounting direction of the selected speaker by selecting a mounting direction pattern which minimizes a degree of variation among sound pressure levels at a plurality of positions on a sound receiving surface defined in the space. An acoustic parameter calculator calculates a variety of acoustic parameters at sound receiving points within the space based on both of the shape information of the space and the optimal mounting direction of the speaker. | 09-16-2010 |
20100232611 | Acoustic Design Support Apparatus - In an acoustic design support apparatus, a speaker selection supporter selects a desired speaker as a candidate for use in a given space based on shape information representing a shape of the space. A speaker mounting angle optimizer calculates an optimal mounting direction of the selected speaker by selecting a mounting direction pattern which minimizes a degree of variation among sound pressure levels at a plurality of positions on a sound receiving surface defined in the space. An acoustic parameter calculator calculates a variety of acoustic parameters at sound receiving points within the space based on both of the shape information of the space and the optimal mounting direction of the speaker. | 09-16-2010 |
20100239099 | Method and Apparatus for Polarity Detection of Loudspeaker - A method and apparatus for polarity detection. The method includes applying a band-pass filter to an impulse response of a loudspeaker, applying an exponential weighting to the band-pass filtered impulse response, wherein the exponential decay parameter is related to the higher corner frequency of the band-pass filter, finding the maximum peak in a waveform of sampled impulse responses, and detecting the connection polarity of the maximum peak as the polarity of the peak. | 09-23-2010 |
20100246838 | Method and Apparatus for Selecting Bass Management Filter - A method and apparatus for enhancing bass management selection. The method includes retrieving a filter response for at least one filter pair, determining expected speaker and woofer spectra, calculating optimal parameters utilizing the retrieved filter response and the determined spectra, measuring flatness to determine if the result is optimal, and utilizing the determined spectra with optimal result in selecting a bass management filters for each speaker. | 09-30-2010 |
20100246839 | SPEAKER CONFIGURATION - A method of configuring an array of speaker elements is disclosed. The method computes a sound that pressure level at various points in the venue and is evaluated by various objective functions. The configuration of a candidate array is changed, for example by the orientation or position of the speakers and the sound field is recalculated. The process is then iterated until an acceptable configuration is found. The real physical array of speakers is then configured in that manner. The method also provides a 3D plot of the sound pressure level displayed against freguency and position in the venue. | 09-30-2010 |
20100246840 | METHOD OF DETERMINING THE HARMONIC AND ANHARMONIC PORTIONS OF A RESPONSE SIGNAL OF A DEVICE - A method of determining the harmonic and anharmonic portions of a response signal (RS) of a device ( | 09-30-2010 |
20100272270 | SELF-CALIBRATING LOUDSPEAKER SYSTEM - Systems and methods for calibrating a loudspeaker with a connection to a microphone located at a listening area in a room. The loudspeaker includes self-calibration functions to adjust speaker characteristics according to effects generated by operating the loudspeaker in the room. In one example, the microphone picks up a test signal generated by the loudspeaker and the loudspeaker uses the test signal to determine the loudspeaker frequency response. The frequency response is analyzed below a selected low frequency value for a room mode. The loudspeaker generates parameters for a digital filter to compensate for the room modes. In another example, the loudspeaker may be networked with other speakers to perform calibration functions on all of the loudspeakers in the network. | 10-28-2010 |
20100272271 | SPEAKER SYSTEM - A loudspeaker system capable of simultaneously providing listeners with a listening environment not giving them a feeling of strangeness. The loudspeaker system ( | 10-28-2010 |
20100278350 | HEADSET SYSTEM COMPRISING A NOISE DOSIMETER - A noise dosimeter (x | 11-04-2010 |
20100296660 | APPARATUS AND METHOD FOR SOUND FOCUSING - A sound focusing technique is provided to transfer sound to a particular direction. In a sound focusing apparatus, first and second speakers may be arranged to emit sound in opposite directions to form a sound zone. An amplitude and/or a phase of a received signal may be adjusted by a signal processing unit to assign the received signal and the adjusted signal to the first and second speakers, respectively. | 11-25-2010 |
20100303250 | Calibration Method and Device in an Audio System - The present publication describes a calibration method and apparatus, in which an electrical calibration signal is formed, an audio signal is formed in the loudspeaker from the calibration signal, the response of the audio signal is measured and analysed, and the system is adjusted on the basis of the measurement results. The calibration signal is formed in the loudspeaker in such a way that it is essentially a sinusoidal signal, the frequency of which scans at least substantially through the entire audio frequency range. | 12-02-2010 |
20100316226 | SIGNAL PROCESSING APPARATUS AND SIGNAL PROCESSING METHOD - A signal processing apparatus includes: one or more detection means for detecting movement of a diaphragm of a speaker in correspondence with feedback methods that are different feedback methods; analog-to-digital conversion means for converting one or more detection signals acquired by the detection means into a digital form; feedback signal generating means for generating feedback signals corresponding to the feedback methods using the digital detection signals; synthesis means for combining an audio signal to be output as a driving signal of the speaker with the feedback signals; correction equalizer means for setting an equalizing characteristic to allow a sound reproduced by the speaker to have a target frequency characteristic by changing the digital audio signal; feedback operation setting means for setting feedback methods in which a feedback operation up to combining the audio signal with the feedback signal is performed and the feedback operation is not performed equalizing characteristic changing and setting means for changing the equalizing characteristic to be set by the correction equalizer means in accordance with a combination of the feedback methods. | 12-16-2010 |
20110007905 | ACOUSTIC SIGNAL PROCESSING DEVICE AND ACOUSTIC SIGNAL PROCESSING METHOD - In a processing control unit | 01-13-2011 |
20110026721 | BONE CONDUCTION DEVICE FITTING - Methods and systems for fitting a bone conduction device are provided herein. These methods and systems comprise determining a gain to be used by the bone conduction device in providing signals at a particular frequency. In determining the gain, a fitting system may provide a test sound that is modulated between a first signal provided to a speaker and a second audible signal provided to a bone conduction device. The first and second audible signal may comprise properties such that when the two signals are added together they produce a constant amplitude output. In an embodiment, each of the first and second audible signals may comprise substantially identical frequency characteristics and signal amplitudes, such as, for example, equal amplitude sinusoids centered on the particular frequency for the measurement. When each of these two audible signals are provided to a recipient of the bone conduction device, the recipient may perceive a variance in the intensity of the sounds when the intensity of the two sounds generated by the two audible signals do not give rise to the same psychophysical loudness. If the recipient perceives this variance, the gain of the bone conduction device may be adjusted to increase or decrease the loudness of the sound provided via the bone conduction device to reduce or eliminate the variance. | 02-03-2011 |
20110064232 | METHOD AND DEVICE FOR ANALYSING AND ADJUSTING ACOUSTIC PROPERTIES OF A MOTOR VEHICLE HANDS-FREE DEVICE - Method and device for analysing and adjusting acoustic properties of a hands-free device of a motor vehicle, including at least one hands-free microphone, at least one vehicle loudspeaker and a first radio interface, using a calibrated measuring microphone and a calibrated test loudspeaker and a data processing device which is connected to the measuring microphone and test loudspeaker and includes a second radio interface. | 03-17-2011 |
20110096935 | Sound Processing Unit, Sound Processing System, Audio Output Unit and Display Device - Practical speaker connection is identified using a device having a sound channel of a 5.1 channel or 7.1 channel, and a device is provided that can easily reproduce the optimum multiple channels. Actual speaker arrangement can be identified by, for example, measuring the impedance of a terminal at the side of an audio amplifier. If incorrect connection is found, a warning is issued. This information is transmitted to a signal source with an EDID and a signal with the optimum a number of sound channel is sent. The EDID is also used for the connection with a display unit and the speaker connection with which the display unit is provided uniquely. For example, a sound through the 7.1 channel is easily reproduced using the speaker of the display unit in the channel of the front speaker. | 04-28-2011 |
20110103602 | ACOUSTICAL MEASURING/ESTIMATION DEVICE - A device to measure or to estimate the acoustical output of the loudspeaker of a earphone, earplug, headphone or ear muff, and to measure the ambient environmental sounds where appropriate. The loudspeaker is connected to an electronic audio device. The acoustical output of the loudspeaker may be measured by means of a microphone placed in close proximity to the loudspeaker; or estimated by means of measuring the output of the audio amplifier (in the electronic audio device) and using the output/input transfer function that relates the acoustical output of the loudspeaker to the output of the audio amplifier; or estimated by means of the output the digital signal processor (in the electronic audio device) and using the output/input transfer function that relates the acoustical output of the loudspeaker to the output of the digital signal processor. The measurement or estimation of the acoustical output of the loudspeaker (and measurement of the ambient environmental noise, if appropriate) may be used to realize a noise dosimeter or as a means to determine the maximum allowable output limit of the electronic audio device. | 05-05-2011 |
20110123035 | DEVICE TO MONITOR A SOUND GENERATOR, IN PARTICULAR AN ALARM SOUND GENERATOR, AND A CORRESPONDING SOUND GENERATOR, AND A RELATED METHOD - A device for monitoring a sound generator includes at least one coupler module, a signal evaluation element, and an output element. The device is coupled by at least one coupler module with the sound generator for purposes of monitoring the latter. | 05-26-2011 |
20110194705 | SYSTEM AND METHOD FOR ADAPTING A LOUDSPEAKER SIGNAL - A sound system | 08-11-2011 |
20110211705 | LOUDSPEAKER RECTIFICATION METHOD - Loudspeaker drivers used in audio systems are subject to performance variance caused by production deviation of components and assembly processes and consequently audio system performance is influenced by the mechanical attributes of individual loudspeaker drivers of which the audio systems are comprised. This invention provides a solution to minimize the variance of duplicate audio system performance by rectifying the signal processing to minimize loudspeaker variance in duplicated or mass production audio systems. | 09-01-2011 |
20110228945 | AUDIO POWER MANAGEMENT SYSTEM - An audio power management system manages operation of audio devices in an audio system. The audio power management system includes a parameter computer, a threshold comparator and a limiter. Audio signals generated with the audio system may be provided to the audio power management system. Based on a measured actual parameter of the audio signal, such as a real-time actual voltage and/or a real-time actual current, the parameter computer can derive estimated operational characteristics of audio devices, such as a loudspeaker included in the audio system. The threshold comparator may use the estimated operational characteristics to develop a threshold and manage operation of one of more devices in the audio system by monitoring the measured actual parameter, and selectively directing the limiter to adjust the audio signal, or another device in the audio system to protect or optimize performance. | 09-22-2011 |
20110243341 | PIPE CALIBRATION METHOD FOR OMNIDIRECTIONAL MICROPHONES - Embodiments include a method comprising forming a pipe including a first end and a second end by forming couplings between a plurality of sections of pipe. A loudspeaker is connected to the first end. The loudspeaker is a mouth simulator loudspeaker. A plurality of microphones are positioned a third distance inside an inside surface of the pipe using a receptacle positioned in the pipe a first distance from the first end and a second distance from the second end. An acoustic output is generated at the loudspeaker. One or more calibration filters are generated using outputs of the plurality of microphones produced in response to the acoustic output. | 10-06-2011 |
20110268286 | METHOD, APPARATUS, AND SYSTEM FOR MASS AUDIO NOTIFICATION FIELD - A mass audio notification system is provided, comprising a network, a plurality of speakers connected to the network, and at least one server connected to the network. The server can send audio data to at least one of the plurality of speakers via a transport link, and the server can send control commands to at least one of the plurality of speakers. The transport link can include a first protocol based on internet protocol. | 11-03-2011 |
20110274281 | Method for Determining Inverse Filter from Critically Banded Impulse Response Data - A method for determining an inverse filter for altering the frequency response of a loudspeaker so that with the inverse filter applied in the loudspeaker's signal path the inverse-filtered loudspeaker output has a target frequency response, and optionally also applying the inverse filter in the signal path, and a system configured (e.g., a general or special purpose processor programmed and configured) to determine an inverse filter. In some embodiments, the inverse filter corrects the magnitude of the loudspeaker's output. In other embodiments, the inverse filter corrects both the magnitude and phase of the loudspeaker's output. In some embodiments, the inverse filter is determined in the frequency domain by applying eigenfilter theory or minimizing a mean square error expression by solving a linear equation system. | 11-10-2011 |
20110299691 | SPEAKER POLARITY DETERMINATION DEVICE - A speaker determination device determines a polarity of a speaker connected to output terminals. Test sound is outputted to an acoustic space via the connected speaker and is collected by a microphone. A reference signal is generated based on the test signal. A polarity determining unit compares predetermined frequency range components of the microphone signal obtained by the microphone and the reference signal, and determines the polarity of the speaker, i.e., whether the speaker is connected in positive phase or in negative phase. | 12-08-2011 |
20120020488 | CONTROL OF A LOUDSPEAKER OUTPUT - A method of controlling a loudspeaker of an electronic device provides voice coil temperature protection. When a power supply for the electronic device is first activated, a binding step is performed in which the loudspeaker impedance is determined and a temperature (such as ambient temperature) is accurately measured. These binding step measurements are used during subsequent use of the loudspeaker, to make the temperature measurements (based on voice coil impedance) as accurate as possible. | 01-26-2012 |
20120039479 | METHOD TO SIMULATE VEHICLE HORN SOUND PRESSURE LEVEL - Methods and system for predicting sound pressure and/or sound pressure level caused by a vehicle horn are provided. An acoustic model of the horn is generated through the use of inverse numerical acoustics and boundary element methods. Additionally, an acoustic model of the vehicle is generated using boundary element methods. By combining these acoustic models and using the acoustic model of the horn as input into the acoustic model of the vehicle, sound pressure and/or sound pressure level at points within the acoustic domain encompassing the acoustic models can be predicted using boundary elements methods. | 02-16-2012 |
20120057714 | Automatic Tunable Earphone And Method For Tuning The Same - An automatic tunable earphone connected with an external audio device has an audio signal output unit, a loudspeaker, a microphone, a data memorizer and an arithmetic unit. The audio signal output unit outputs a testing audio signal into the loudspeaker for generating a testing sound which is transmitted into an ear canal. The microphone placed in the ear canal receives the sound that has past through the ear canal and outputs a contrastive audio signal into the data memorizer for restoring. The arithmetic unit compares the contrastive audio signal with the testing audio signal to find out the frequency that needs to be strengthened. The frequency is restored into the data memorizer. When the external audio device outputs a raw signal, the arithmetic unit process the raw signal according to the frequency restored and outputs the processed signal into the loudspeaker for making sound. | 03-08-2012 |
20120063607 | MOBILE ELECTRONIC DEVICE AND SOUND PLAYBACK METHOD THEREOF - A mobile electronic device and a sound playback method thereof are provided. The mobile electronic device includes a sensor, a speaker, and a controller coupled to the sensor and the speaker. The sensor detects whether the speaker is blocked or not. When the speaker is blocked, the controller multiplies a sound signal by a transfer function and then outputs the multiplied sound signal. The speaker plays the sound signal outputted by the controller. The transfer function changes the direction in which the speaker plays the sound signal. | 03-15-2012 |
20120082317 | ELECTRONIC DEVICES WITH IMPROVED AUDIO - An electronic device having an enclosure including an upper panel and a bottom panel operably connected to the upper panel. A transducer is operably connected to the enclosure and the transducer is configured to mechanically vibrate the enclosure. The transducer includes an electromagnet, a magnet in communication with the electromagnet and a bracket substantially surrounding the electromagnet and the magnet, the bracket substantially secures the transducer to the bottom panel. | 04-05-2012 |
20120082318 | AUDIO DIRECTION-DISTANCE DETECTION - A laser device, finder of range(s), and an inclinometer are used to figure a sound producing device's position adjustment(s). Laser beam(s) of the laser device and the inclinometer characterize direction(s) of sound produced by the sound producing device. The laser beam(s) can be one or more colors or patterns each characterizing the general direction of sound produced by the sound producing device. A stadium can have many speaker housings each including a speaker, the laser, range finder and the inclinometer. Each speaker housing is mounted on, and remotely adjustable with respect to, an structural member as to the general direction of sound emitted from the speaker housing into the area for stadium seating. The inclinometer's output can be rendered by a monitor seen by an audio engineer who also uses the laser beam's direction to make adjustments to the position of the speaker housing relative to its structural member. | 04-05-2012 |
20120121098 | CONTROL OF A LOUDSPEAKER OUTPUT - A control signal is generated for mechanical loudspeaker protection, or for other signal pre-processing functions. The procedure contains the following steps:
| 05-17-2012 |
20120140936 | Systems and Methods for Monitoring Cinema Loudspeakers and Compensating for Quality Problems - Systems and processes for compensating for changes in a theatre sound system positioned in a theatre are described. A subsequent response of a loudspeaker to a test signal is captured and compared to a previously obtained signature response of the loudspeaker to the test signal. An audio signal can be processed based on the comparison to compensate for changes to loudspeaker performance, or otherwise. | 06-07-2012 |
20120155663 | FAST SPEAKER HUNTING IN LAWFUL INTERCEPTION SYSTEMS - A method for spotting an interaction in which a target speaker associated with a current index or current interaction speaks, the method comprising: receiving an interaction and an index associated with the interaction, the index associated with additional data; receiving the current interaction or current index associated with the target speaker; obtaining current data associated with the current interaction or current index; filtering the index using the additional data, in accordance with the current data associated with the current interaction or current index, and obtaining a matching index; and comparing the current index or a representation of the current interaction with the matching index to obtain a target speaker index. | 06-21-2012 |
20120170762 | METHOD AND APPARATUS FOR CONTROLLING DISTRIBUTION OF SPATIAL SOUND ENERGY - A spatial sound energy (SSE) distribution control apparatus calculates filter coefficients for controlling distribution of the sound energy of an input signal, in consideration of a sound energy ratio between a reduction region for reducing transmission of a sound energy emitted through an array speaker and a concentration region for concentrating transmission of the sound energy and also in consideration of a sound energy efficiency of the concentration region. Also, the SSE distribution control apparatus determines an array size of a speaker in a case where the sound energy ratio is maximized, according to frequency variation of the input signal. | 07-05-2012 |
20120177211 | Transducer with Integrated Sensor - An electroacoustic transducer includes a housing and a moving portion adapted to move relative to the housing. The moving portion has a first surface and includes a first electrode. A second electrode on a first surface of the housing is located proximate to a first region of the first electrode, and a third electrode on the first surface of the housing is located proximate to a second region of the first electrode. A capacitance between the first and second electrodes and a capacitance between the first and third electrodes vary similarly with displacement of the moving portion relative to the housing. An impedance buffer is coupled to the second electrode and the third electrode. | 07-12-2012 |
20120201395 | METHOD AND SYSTEM FOR CONTROLLING A MAXIMUM SIGNAL LEVEL OUTPUT TO HEADPHONES COUPLED TO A WIRELESS DEVICE - A method for controlling a maximum signal level output to headphones of a wireless device is provided. The method includes: determining an impedance of the headphones; determining a carrier specific maximum signal level for headphones having the impedance; and, adjusting an audio amplifier of the wireless device coupled to the headphones to restrict the maximum signal level output to the headphones to the carrier specific maximum signal level. | 08-09-2012 |
20120237045 | AUDIO POWER MANAGEMENT SYSTEM - An audio power management system manages operation of audio devices in an audio system. The audio power management system includes a parameter computer, a threshold comparator and a limiter. Audio signals generated with the audio system may be provided to the audio power management system. Based on a measured actual parameter of the audio signal, such as a real-time actual voltage and/or a real-time actual current, the parameter computer can derive estimated operational characteristics of audio devices, such as a loudspeaker included in the audio system. The threshold comparator may use the estimated operational characteristics to develop a threshold and manage operation of one of more devices in the audio system by monitoring the measured actual parameter, and selectively directing the limiter to adjust the audio signal, or another device in the audio system to protect or optimize performance. | 09-20-2012 |
20120237046 | INTERCOM HEADSET CONNECTION AND DISCONNECTION RESPONSES - A headset is able to be coupled via a cable to an intercom system, is able to be wirelessly coupled to a wireless device via a wireless transceiver of the headset, and is able to be connected to a wired device via another cable. A controller of the headset separately monitors the microphone conductors and audio conductors by which the headset may be coupled to the intercom system to detect whether or not one or both of a communications microphone and an acoustic driver of the headset are coupled to the intercom system, and monitors the operating state of the wireless transceiver to detect whether or not the wireless transceiver is inactive, on standby or in use; and selectively couples a system ground conductor to one of the microphone conductors, and selectively provides a local microphone bias voltage in response to what is observed through such monitoring. | 09-20-2012 |
20120263309 | Loudspeaker Control Apparatus and Method for Inspecting Loudspeaker - A loudspeaker control apparatus of the present invention includes: an operation reception section that receives a user operation; a mode selection section that selects between two operation modes, based on the user operation, either a normal mode in which operations of a plurality of loudspeakers and lights are controlled independently or an inspection mode in which each of the plurality of loudspeakers is inspected to see whether it is operating normally; and a control section that controls the operations of the plurality of loudspeakers and lights based on the operation mode, and the control section, in the inspection mode, sequentially causes the plurality of loudspeakers to output an inspection tone and sequentially causes lights which correspond to the loudspeakers from which the inspection tone is being outputted to be turned on or to blink. | 10-18-2012 |
20120288107 | TEST SYSTEM FOR EVALUATING FEEDBACK PERFORMANCE OF A LISTENING DEVICE - A test system for evaluates acoustic feedback characteristics of a listening device by changing the transfer function of the signal path from an acoustic output to an acoustic input of the listening device. A variable filter comprises an acoustic input, an acoustic output, and a control unit for changing a transfer function of the filter. First and/or second acoustic propagation elements propagate acoustic sound, the first acoustic propagation element acoustically connecting the acoustic output of the listening device with the acoustic input of the variable filter, the second acoustic propagation element acoustically connecting the acoustic output of the variable filter with the acoustic input of the listening device; wherein the system is configured to allow a determination of acoustic feedback or a level of acoustic feedback of the listening device at different frequencies. | 11-15-2012 |
20120294450 | Monitoring and Correcting Apparatus for Mounted Transducers and Method Thereof - An apparatus comprises at least one processor and at least one memory including computer program code the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform: monitoring at least one indicator dependent on a transducer mechanical integration parameter; and determining a change in the at least one indicator. | 11-22-2012 |
20120300952 | CALIBRATION SYSTEM WITH CLAMPING SYSTEM - Systems and methods are described for clamping a headset in a calibration system using a clamp system that includes a clamp, platform, and one or more spindles (e.g., cushion spindles) to minimize or eliminate issues associated with positioning of headsets. The clamp system comprises a mount having a receptacle. When a device is introduced to the mount the receptacle receives at least a portion of a device. The clamp system includes a clamp attached to the mount and having a first arm rotateably coupled to a second arm that controls the first arm between an open position and a closed position. A platform and at least one spindle are connected to the first arm. When the device is present in the receptacle and the first arm is in the closed position the spindle contacts the device and seats or secures the device in the receptacle. | 11-29-2012 |
20120328116 | Microphone Headset Failure Detecting and Reporting - Embodiments of the invention include methods, apparatus, and systems for detecting a predicted future or current failure of a microphone of a headset. The failure may have been caused by organic matter buildup creating a signal path or short circuit across the microphone's circuitry. The headset is connected to a mobile device having a network interface that is used to send a notification message to a remote supply management system server. A failure detection circuit detects the failure based on a decrease in a microphone bias signal or increase in headset temperature over time. In some cases, the failure is based on an increase in a microphone bias signal over time. Upon detection of the failure, it signals that a failure notification be transmitted to the remote supply management system. The notification may then cause a new headset to be sent to the owner of the mobile device. Other embodiments are also described and claimed. | 12-27-2012 |
20120328117 | CONTROL OF A LOUDSPEAKER OUTPUT - A loudspeaker drive circuit uses a dynamic range compressor to implement a non-linear gain function between the input signal to the dynamic range compressor and an output signal from the dynamic range compressor. The output is used to drive a loudspeaker, and the operating parameters of the dynamic range compressor are varied in dependence on a criterion, such as the estimated voice coil temperature, the power consumption or the acoustical distortion. | 12-27-2012 |
20130003982 | ELECTRONIC APPARATUS AND OPERATION METHOD THEREOF - The invention provides an electronic apparatus. In one embodiment, the electronic apparatus comprises a hard disk, a speaker, and a processor. The hard disk comprises a vibration protection mechanism which lowers the performance of the hard disk when the vibration protection mechanism is activated. The speaker broadcasts a sound. The processor determines whether a vibration level of the speaker is greater than a threshold level, determines whether data stored in the hard disk is being accessed when the vibration level of the speaker is greater than the threshold level, and lowers a volume of the speaker when the data stored in the hard disk is being accessed and the vibration level of the speaker is greater than the threshold level, thereby preventing the vibration protection mechanism from being activated to maintain the performance of the hard disk. | 01-03-2013 |
20130016844 | SUBSONIC TEST SIGNAL GENERATION TECHNIQUEAANM Llewellyn; William D.AACI San JoseAAST CAAACO USAAGP Llewellyn; William D. San Jose CA US - An apparatus includes a capacitor, a current generating circuit communicatively coupled to the capacitor, and a current pulse timing circuit communicatively coupled to the current source circuit. The current timing pulse circuit is configured to time durations of a first plurality of current pulses from the current generating circuit for charging the capacitor and a second plurality of current pulses for discharging the capacitor, and step the durations of the current pulses between a minimum duty cycle and a maximum duty cycle. A cycle of providing the first plurality of current pulses and providing the second plurality of current pulses results in generation of a subsonic pseudo-sinusoidal pulse signal at the capacitor. | 01-17-2013 |
20130022210 | METHOD AND APPARATUS FOR IMPULSE RESPONSE MEASUREMENT AND SIMULATION - A method of measuring an impulse response of an amplifier coupled in operation to a loudspeaker arrangement includes:
| 01-24-2013 |
20130028429 | INFORMATION PROCESSING APPARATUS AND METHOD OF PROCESSING AUDIO SIGNAL FOR INFORMATION PROCESSING APPARATUS - According to one embodiment, an information processing apparatus includes a measurement module and a correction filter design module. The measurement module measures frequency characteristics of an earphone connected to an output terminal using a measurement audio signal output from the output terminal and collected by a microphone. The correction filter design module designs a correction filter in association with one range of a treble range higher than a crossover frequency range and a bass range lower than the crossover frequency range, based on the measured frequency characteristics of the earphone and predetermined goal frequency characteristics. | 01-31-2013 |
20130028430 | METHOD AND DEVICE FOR CHECKING LOUDSPEAKERS - The method for checking loudspeakers comprises the steps of emitting a pulse over an electrical connection with the loudspeaker; measuring the electrical resistance over the connection; determining the state of the loudspeaker according to the measured resistance; and triggering a corrective action depending on the determined state of the loudspeaker. The claimed method further comprises the steps of associating a plurality of amplification systems to different subsets of the plurality of loudspeakers; assigning different signals to be emitted by different loudspeakers for each of a plurality of control signals; and storing parameters representing the signals to be emitted in each amplification system. When a control signal common to the different amplification systems is received, the amplification systems cause the loudspeakers to emit the different signals and the corrective action comprises memorizing the parameters representing the status of the loudspeaker. | 01-31-2013 |
20130044887 | AUDIO APPARATUS AND AUDIO CONTROLLER THEREOF - An audio apparatus is provided. The audio apparatus includes at most one electroacoustic transducer; and an audio controller, coupled to the electroacoustic transducer, for actively controlling the electroacoustic transducer to function as a loudspeaker or a microphone, wherein the loudspeaker converts output electrical signals to output sounds, and the microphone converts input sounds to input electrical signals. | 02-21-2013 |
20130044888 | AUDIO DEVICE AND AUDIO PRODUCING METHOD - The invention relates to an audio device comprising:
| 02-21-2013 |
20130051572 | METHOD FOR OPTIMIZING REPRODUCTION OF AUDIO SIGNALS FROM AN APPARATUS FOR AUDIO REPRODUCTION - There is provided a calibration method for calibrating a variable number of speakers. The method includes determining physical features around a location of each of the variable number of speakers and calibrating at least one of the variable number of speakers. | 02-28-2013 |
20130058492 | APPARATUS AND METHOD FOR MEASURING A PLURALITY OF LOUDSPEAKERS AND MICROPHONE ARRAY - An apparatus for measuring a plurality of loudspeakers arranged at different positions includes a generator of a test signal for a loudspeaker; a microphone device configured for receiving a plurality of different sound signals in response to one or more loudspeaker signals emitted by one of the loudspeakers in response to the test signal; a controller for controlling emissions of the loudspeaker signals by the loudspeakers and for handling the different sound signals so that a set of sound signals recorded by the microphone device is associated with each loudspeaker in response to the test signal; and an evaluator for evaluating the set of sound signals for each loudspeaker to determine at least one loudspeaker characteristic for each loudspeaker and for indicating a loudspeaker state using the at least one loudspeaker characteristic. This scheme allows automatic, efficient and accurate measurement of loudspeakers arranged in a three-dimensional configuration. | 03-07-2013 |
20130070933 | FAILURE DETECTION DEVICE FOR VEHICLE SPEAKER - A failure detection device for a vehicle speaker includes a signal generator, an amplifier, a coupling capacitor, a detection circuit, and a determination section. The signal generator generates a sound signal corresponding to a sound outputted from the speaker. The amplifier amplifies the sound signal generated by the signal generator. The coupling capacitor supplies the sound signal amplified by the amplifier to the speaker. The detection circuit directly or indirectly detects a terminal voltage on a terminal of the speaker. The determination section determines whether an open-circuit occurs in the speaker based on a phase difference between a phase of the sound signal and a phase of the terminal voltage. The terminal of the speaker is coupled to the coupling capacitor. | 03-21-2013 |
20130108066 | APPARATUS AND METHOD FOR TRACKING LOCATIONS OF PLURALITY OF SOUND SOURCES | 05-02-2013 |
20130114819 | APPARATUS FOR CHANGING AN AUDIO SCENE AND AN APPARATUS FOR GENERATING A DIRECTIONAL FUNCTION - An apparatus for changing an audio scene has a direction determiner and an audio scene processing apparatus. The audio scene has at least one audio object having an audio signal and associated meta data. The direction determiner determines a direction of a position of the audio object with respect to a reference point based on the meta data of the audio object. Further, the audio scene processing device processes the audio signal, a processed audio signal derived from the audio signal or the meta data of the audio object based on a determined directional function and the determined direction of the position of the audio object. | 05-09-2013 |
20130163770 | CHANNEL DIVIDER, SOUND REPRODUCING SYSTEM INCLUDING THE CHANNEL DIVIDER, AND METHOD FOR SETTING CROSSOVER FREQUENCY OF THE CHANNEL DIVIDER - A channel divider that can suitably set a crossover frequency when a biwiring-connectable multiway speaker system including network circuits are used is provided. The channel divider includes a low-pass filter LPF and a high-pass filter HPF for dividing a band of a sound signal into a first output signal and a second output signal so as to output the signals, and a control circuit for controlling the filters. The channel divider has a sound output mode in which the control circuit sets a cutoff frequency fcL of LPF to a value higher than fc | 06-27-2013 |
20130170659 | Speaker Impedance Measurement - An integrated circuit for processing audio and voice signals in a telephone is disclosed. The integrated circuit comprises an audio output port having a first and a second output terminal for connection to a first and a second input terminal, respectively, of a speaker. The integrated circuit further comprises an audio input port having a first and a second input terminal for connection to a first and a second output terminal of an audio input source. The integrated circuit also comprises at least one audio output path and one audio input path. Moreover, the integrated circuit comprises a test impedance, such as a resistor, (RT) for measuring an electrical impedance of the speaker. | 07-04-2013 |
20130182859 | AUDIO SYSTEM WITH SYNTHESIZED POSITIVE IMPEDANCE - An electrical apparatus to sense current through a load includes a first input terminal having a first input voltage relative to a reference, a second input terminal having a second input voltage relative to the reference, a first load terminal of the load having a first load voltage relative to the reference, a second load terminal of the load having a second load voltage relative to the reference, a first current sensing element connected between the first input terminal and the first load terminal and a second current sensing element connected between the second input terminal and the second load terminal. A first sense voltage is determined by a relationship between the first input voltage and the second load voltage and a second sense voltage is determined by a relationship between the second input voltage and the first load voltage. | 07-18-2013 |
20130202122 | Loudspeaker Driver With Sensing Coils For Sensing The Position And Velocity Of a Voice-Coil - This invention concerns a loudspeaker driver includes at least one actuator connected to a vibrating support to impart excitation to the latter when caused to move, wherein the loudspeaker driver further includes a plurality of sensing members arranged to move with the at least one actuator, each sensing member providing output sensing data dependent on the velocity of said at least one actuator, and means for determining the position of the at least one actuator based on at least one ratio (X/Y) of output sensing data or of linear combinations of output sensing data provided from the plurality of sensing members, said at least one ratio being independent of the velocity of the at least one actuator. | 08-08-2013 |
20130216051 | ACOUSTIC APPARATUS - An acoustic apparatus includes: a plurality of speakers, which are connected in parallel to each other; and a line break detector for detecting the number of line break in the speakers. The line break detector includes: a detection voltage generator for applying a reference voltage to the speakers; and a line break determination device for determining the number of line break according to an actual voltage of the speakers when the reference voltage is applied to the speakers or when application of the reference voltage to the speakers is stopped. Thus, without using an impedance measurement device, the number of line break is calculated based on the actual voltage of the speakers. The number of line break in the speakers is easily detected with low manufacturing cost. | 08-22-2013 |
20130216052 | Headphone Response Optimization - Optimized sound waves presented to the listener by headphones, notwithstanding differences in ear geometry and headphone positioning. A test signal causes an acoustic sensor to receive sound waves actually formed in the listener's ear cavity. A response from the sensor is compared with an expected ear cavity transfer function, from which desired adjustments to the audio signal are determined. The audio signal might be received from an application program, calibrated by an interface software element, and adjusted thereby, before forwarding to the headphones. Calibration might be performed from when the headphones are positioned, or dynamically in response to changes in the transfer function. | 08-22-2013 |
20130223637 | Piezoelectric Speaker Device - A piezoelectric speaker device that includes an insulation layer having an electric insulation property formed on a user-side driving electrode, and flaw detection electrode lines formed on the insulation layer. If the flaw detection electrode lines are determined to be damaged due to the occurrence of a flaw, the driving voltage applied to the driving electrodes is lowered. In order to prevent electric-shock accidents, the driving voltage is lowered to below 42.4 V, preferably, and to 0 V, more preferably. | 08-29-2013 |
20130236023 | SYSTEM FOR HEADPHONE EQUALIZATION - A system for headphone equalization includes a stored set of predetermined tone burst reference signals and a stored set of predetermined tone burst test signals that form a range of frequencies used in a user specific audio test to develop a headphone correction filter. A predetermined tone burst reference signal and a predetermined tone burst test signal may intermittently and sequentially drive a transducer included in the headphone. A loudness of the predetermined tone burst reference signal may be fixed and a loudness of the predetermined tone burst test signal may be variable with a gain setting. The gain setting may be used to generate the headphone correction filter. | 09-12-2013 |
20130236024 | SOUND QUALITY TESTING DEVICE - A sound quality testing device for testing a communication apparatus has a sound generating unit and a sound receiving unit. The sound quality testing device includes a carrying unit, a first testing module, and a second testing module. The carrying unit carries the communication apparatus. The first testing module generates and sends a sound signal to the sound receiving unit. The second testing module receives a sound-generating signal generated by the sound generating unit. The sound quality testing device provides a standardized simulation testing environment having low or no noise signals, such that the communication apparatus can be tested precisely and steadily in terms of sound quality, such as volume, frequency responses, and harmonic wave distortion. | 09-12-2013 |
20130251164 | LOUDSPEAKER DRIVE CIRCUIT FOR DETERMINING LOUDSPEAKER CHARACTERISTICS AND/OR DIAGNOSTICS - A loudspeaker amplifier drive circuit performs analysis of various signals relating to the input and output of the amplifier such that the characteristics and/or diagnostics of a loudspeaker driven by the amplifier can be derived. These are then presented as outputs, so that different circuitry can make use of the information for audio signal processing. | 09-26-2013 |
20130251165 | TEST DEVICE FOR A SPEAKER MODULE FOR A LISTENING DEVICE - The application relates to a test device for a speaker module of a listening device, the speaker module comprising a speaker unit for converting an electric output signal to an output sound. The application further relates to a test system and to a data update device. An object of the present application is to provide an alternative scheme for identifying a receiver (speaker) in a listening device, e.g. a hearing aid. The problem is solved in that the test device being a separate device adapted for being electrically connected to the speaker module in a test situation, but not during normal operation of the listening device. An advantage of the invention is that it provides a flexible alternative to a receiver identification solution that is integrated into the listening device. | 09-26-2013 |
20130259246 | APPARATUS AND METHOD FOR INTERFACING EARPHONE - An apparatus and method for interfacing with an earphone are provided. The method includes checking if the earphone is uninstalled promptly after the connection of the earphone is sensed in an external port and if it is sensed that the earphone is uninstalled, continuing to apply a voltage to a MIC_BIAS terminal. The generation of a noise of the MIC_BIAS terminal caused by applying of a periodic voltage resulted from loose insertion of the earphone is prevented. | 10-03-2013 |
20130272530 | In-Ear Audio Device Customization - An in-ear audio device has a casing on which is disposed one or more bags are positioned to be filled with fillable material during a customization process in which a test sound is acoustically output into an ear canal by an acoustic driver of the in-ear audio device while the one or more bags are being filled, and a microphone acoustically coupled to the ear canal is employed to detect sounds within the ear canal that are indicative of the frequency response of the acoustic output of the acoustic driver to determine when the degree of sealing of the ear canal by the one or more bags is sufficient to achieve a desired quality of frequency response. | 10-17-2013 |
20130279710 | SYSTEMS AND METHODS FOR SENSING THE OPERATIONAL STATUS OF AN ACOUSTIC HORN - A system for sensing an operational status or level of performance of an acoustic horn makes use of a vibration sensor that is operatively coupled to the driver of the acoustic horn. The sensor can be an accelerometer. The sensor outputs a vibration signal when the acoustic horn is operating. Characteristics of the vibration signal are compared to threshold values or to patterns to determine the operational status or level of performance of the acoustic horn. | 10-24-2013 |
20130287216 | ESTIMATION AND SUPPRESSION OF HARMONIC LOUDSPEAKER NONLINEARITIES - A harmonic echo power estimator estimates power of echo generated by harmonic loudspeaker nonlinearities in a user equipment having an echo path between a loudspeaker input and a microphone output. The estimator includes a frequency band mapper that maps each frequency band in a set of loudspeaker output signal frequency bands into a corresponding array of loudspeaker input signal frequency bands, where each frequency band in the set is mapped into several frequency bands in the corresponding array. A power estimator determines a power estimate of each input signal in each array of frequency bands. A power estimate combiner combines determined power estimates in each array of frequency bands into a corresponding estimate of loudspeaker input power generating harmonic loudspeaker nonlinearities. A power estimate transformer transforms the estimates of loudspeaker input power across the echo path into power estimates of the echo generated by the harmonic loudspeaker nonlinearities. | 10-31-2013 |
20130329897 | ELECTRONIC AUDIO DEVICE TO DETERMINE MATCHING AND NON-MATCHING SPEAKERS - An electronic audio system that determines matching and non-matching speakers is disclosed. The electronic audio system includes a first speaker; a second speaker; and a comparator circuit. The comparator circuit is coupled to the first speaker and the second speaker to receive an input signal from both the first and second speaker. The comparator circuit is configured to determine if the first speaker and the second speaker are matching speakers or non-matching speakers, in which, the first and second speakers are matching speakers if they are common vendor speakers. Other embodiments are also described and claimed. | 12-12-2013 |
20130329898 | SPEAKER TEMPERATURE CONTROL USING SPEAKER TEMPERATURE AND SPEAKER IMPEDANCE ESTIMATES - A thermal control module computes an estimate of a temperature of a speaker, based on an audio signal that is driving the speaker, and computes a gain that is applied to attenuate the audio signal to prevent overheating of the speaker. Thermal control module computes an adapted impedance, being an estimate of the speaker's impedance including its DC resistance, and uses it to compute the temperature estimate. The adapted impedance is obtained from a normal adaptation process when a measured voltage of the speaker is above a threshold, and a decay process when the measured voltage is below the threshold. Other embodiments are also described. | 12-12-2013 |
20130329899 | MEASURING APPARATUS AND COMPUTER PROGRAM - According to one embodiment, a measuring apparatus includes: an output module configured to temporally exclusively output, to a measuring target system, a first output signal corresponding to a first measuring signal for sweeping frequency and a second output signal corresponding to a second measuring signal for sweeping frequency and having a different amplitude characteristic from an amplitude characteristic of the first measuring signal; and a frequency characteristic computation module configured to synthesize a first frequency amplitude spectrum obtained from a first reception signal when a sound output from the measuring target system based on the first output signal is received and a second frequency amplitude spectrum obtained from a second reception signal when a sound output from the measuring target system based on the second output signal is received to generate frequency characteristic data representing an acoustic characteristic. | 12-12-2013 |
20140023198 | METHOD AND CIRCUIT FOR TESTING AN AUDIO HIGH-FREQUENCY LOUDSPEAKER BEING PART OF A LOUDSPEAKER SYSTEM - The present invention relates to a method and a circuit for testing a tweeter, said tweeter being part of a loudspeaker system, wherein the method includes the steps of: applying a high-frequency voltage signal to one terminal of said tweeter, said high-frequency voltage signal being generated by first electronic means; applying a constant voltage signal to the other terminal of said tweeter, said constant voltage signal being generated by second electronic means; measuring a current I | 01-23-2014 |
20140029757 | PROVIDING A CONFIDENCE MEASURE FOR SPEAKER DIARIZATION - Method, system and computer product are provided for a computer implemented method for providing a confidence measure for speaker diarization. The method includes: receiving an audio session as unsegmented audio data; computing a spectral ratio of principal component analysis (PCA) of sections of the received audio session by a ratio between the largest eigenvalue and the second largest eigenvalue; using the PCA spectral ratio as a confidence measure for speaker diarization processing. | 01-30-2014 |
20140037097 | Loudspeaker Calibration Using Multiple Wireless Microphones - An illustrative embodiment includes a method for use in performing acoustic calibration of at least one audio output device for a plurality of listening locations. An audio input device generates a data signal based on a series of one or more tones output by the at least one audio output device. The audio input device wirelessly transmits the data signal to a calibration device. The audio input device is one of a plurality of audio input devices deployed at respective ones of the plurality of listening locations. The data signal is one of a plurality of data signals generated by respective ones of the plurality of audio input devices based on the series of one or more tones output by the at least one audio output device. The plurality of data signals are wirelessly transmitted by the respective ones of the plurality of audio input devices to the calibration device. | 02-06-2014 |
20140064502 | METHOD FOR PROCESSING AN AUDIO SIGNAL WITH MODELING OF THE OVERALL RESPONSE OF THE ELECTRODYNAMIC LOUDSPEAKER - The method comprises the determination of an observation vector that comprises only electrical measurements of the voltage (U | 03-06-2014 |
20140064503 | METHOD AND APPARATUS FOR CONTROLLING AUDIO OUTPUT - A method and portable terminal for automatically controlling an output volume of audio output of a head phone when the head phone is connected to a portable terminal are provided. The method of controlling an audio output in a portable terminal, includes outputting a test audio signal to a head phone for a preset playback time when the head phone is connected to the portable terminal; collecting neighboring noise interval information and impedance interval information of the head phone while the test audio signal is output to the head phone; determining impedance of the head phone based on the neighboring noise interval information and the impedance interval information; determining a gain of an audio signal based on the determined impedance; and amplifying the audio signal in proportion to the determined gain, and outputting the amplified audio signal to the head phone. | 03-06-2014 |
20140079230 | SOUND OUTPUT SYSTEM, INFORMATION PROCESSING APPARATUS, COMPUTER-READABLE NON-TRANSITORY STORAGE MEDIUM HAVING INFORMATION PROCESSING PROGRAM STORED THEREIN, AND SOUND OUTPUT CONTROL METHOD - In a sound output system including: an information processing apparatus; a first output device; and a second output device, the information processing apparatus generates, based on predetermined information processing, a first sound signal to be outputted to the first output device, and a second sound signal that is a sound signal to be outputted to the second output device and has a content different from that of the first sound signal. When headphones are connected to the second output device, the second sound signal is generated such that at least a part of a first sound which is not outputted as a second sound when no headphones are connected, is contained in the second sound, and the second sound is outputted from the headphones. | 03-20-2014 |
20140079231 | MOBILE COMMUNICATION TERMINAL - A mobile communication terminal including: a window glass provided on a front side of a terminal main body; a speaker hole formed on an edge of the terminal main body corresponding to an edge of an outer portion of the window glass, exposed to the outside, and formed to correspond to a speaker provided in the terminal main body; and a sensor connected to the speaker, and sensing a direction in which the terminal main body is slanted, wherein the sensor controls the speaker to open or close the speaker hole according to the direction in which the terminal main body is slanted. | 03-20-2014 |
20140093089 | MEMS SPEAKER DEVICE WITH AN ELECTRONIC TEST CIRCUIT - A MEMS speaker device including a membrane that forms a first capacitor and a second capacitor, respectively, with a top plate and with a bottom plate. The device includes a driving circuit that operates, during a first operating period, to move the membrane into a first position, in which the membrane is close to the bottom plate, and during a second operating period, to move the membrane into a second position, in which the membrane is close to the top plate. The device includes a testing circuit having a measuring circuit, which generates a first signal, based on a capacitance of one of the first capacitor and the second capacitor and a second signal based on a capacitance of one of the first capacitor and the second capacitor; and a comparator, which compares the first and second signals with at least one first electrical reference quantity. | 04-03-2014 |
20140098965 | METHOD FOR MEASURING ELECTROACOUSTIC PARAMETERS OF TRANSDUCER - A method discloses measuring electroacoustic parameters of transducer. With known voice-coil displacement, voice-coil current, transducer impedance and its stimulus signal as inputs, the five calculation procedures of direct problem, adjoint problem, sensitivity problem, conjugate gradient method, and constraint equations are involved in inversely solving electroacoustic parameters. The presented method has the characteristics of high efficiently, low iterations for computational algorithm, and high accuracy for electroacoustic parameters estimation. Through the numerical result and discussion, the relative errors between estimated and accurate electroacoustic parameters are sufficiently small even with the inclusion of the inevitable measurement errors. These results indicate that the presented method has high feasibility for estimating electroacoustic parameters of a transducer. | 04-10-2014 |
20140098966 | METHOD FOR EFFICIENT SOUND FIELD CONTROL OF A COMPACT LOUDSPEAKER ARRAY - A method for optimizing the design and sound field control of a compact loud-speaker array, which includes a plurality of loudspeakers located on a closed loudspeaker surface and the control of the emitted sound field by the loudspeakers within a limited reproduction subspace, having the steps of capturing the sound field using a plurality of microphones and adjusting filter coefficients that modify the alimentation signals of the loudspeakers to minimize the difference between reproduced signals captured by the microphones and target signals describing a target sound field. A conical reproduction surface encloses a reproduction subspace is defined such that the apex of the conical reproduction surface is within the closed loudspeaker surface. Loud-speakers are positioned on a limited loudspeaker surface and the closed loudspeaker surface. The microphones are located on a limited microphone surface defined by the intersection of the inner volume of the conical reproduction subspace and the closed microphone surface. | 04-10-2014 |
20140112484 | Automatic Detection of Loudspeaker Characteristics - Disclosed is subject matter that proposes a system and method for a media device to automatically detect the characteristics of an attached speaker. Speakers have many different characteristics, for example, power, impedance, frequency response, etc. With knowledge of the speaker characteristics, audio output can be equalized appropriately, and an amplifier of the media device, for example, can prevent exceeding the maximum power handling capability of the speaker. Described is a device and method for retrieving information about the speaker from a memory that is coupled to the speaker. A media device can read the data from the memory over existing speaker wires. Software and/or hardware in the media device can optimize the output to the attached speaker. Accordingly, the media device can interrogate the speaker directly over speaker wire to obtain the characteristics of the speaker. | 04-24-2014 |
20140112485 | Stackable Communications System - An audio system that comprises an audio server and individual speaker clients may be connected. Individual speaker clients may or may not be the same physical configuration. When the audio server detects each speaker client, the audio server configures each speaker to a particular purpose. This allows remote configurable speakers to be used for different features. Other audio devices may also be connected to the audio server. | 04-24-2014 |
20140119550 | Transmit Audio in a Target Space - Implementations disclosed herein relate to transmitting audio in a target space relative to an electronic device ( | 05-01-2014 |
20140119551 | Audio Playback System Monitoring - In some embodiments, a method for monitoring speakers within an audio playback system (e.g., movie theater) environment. In typical embodiments, the monitoring method assumes that initial characteristics of the speakers (e.g., a room response for each of the speakers) have been determined at an initial time, and relies on one or more microphones positioned in the environment to perform a status check on each of the speakers to identify whether a change to at least one characteristic of any of the speakers has occurred since the initial time. In other embodiments, the method processes data indicative of output of a microphone to monitor audience reaction to an audiovisual program. Other aspects include a system configured (e.g., programmed) to perform any embodiment of the inventive method, and a computer readable medium (e.g., a disc) which stores code for implementing any embodiment of the inventive method. | 05-01-2014 |
20140126730 | METHODS AND APPARATUS RELATED TO PROTECTION OF A SPEAKER - In one general aspect, a method can include calculating, at a calibration temperature of a speaker, a calibration parameter through a coil of the speaker in response to a first test signal, and can include sending a second test signal through the coil of the speaker. The method can also include measuring a parameter through the coil of the speaker based on the second test signal, and calculating a temperature change of the coil of the speaker based on the parameter and based on the calibration parameter at the calibration temperature. | 05-08-2014 |
20140133665 | METHODS AND APPARATUSES FOR REPRESENTING A SOUND FIELD IN A PHYSICAL SPACE - Methods and apparatuses for representing a sound field in a physical space are provided and described as embodied in a system that includes a sound transducer array along with a touch surface-enabled display table. The array may include a group of transducers (multiple speakers and/or microphones). The array may be configured to perform spatial processing of signals for the group of transducers so that sound rendering (in configurations where the array includes multiple speakers), or sound pick-up (in configurations where the array includes multiple microphones), may have spatial patterns (or sound projection patterns) that are focused in certain directions while reducing disturbances from other directions. | 05-15-2014 |
20140140522 | ESTIMATING NONLINEAR DISTORTION AND PARAMETER TUNING FOR BOOSTING SOUND - Embodiments for estimating nonlinear distortion and for tuning parameter(s) for boosting sounds are described. A test signal including at least two simultaneous audible tones is generated. One tone is a fundamental tone and others are harmonics of the fundamental tone. The ratio of the number of nonlinear distortion products not coincident with the frequencies of the tones to the number of all the products is, as an example, greater than 0.80. A spectral analysis is performed on the response of a loudspeaker to the test signal. A nonlinear distortion value is estimated by regarding the energy at harmonic frequencies of the fundamental tone signal but not at the frequencies of the tone signals as contribution from the nonlinear distortion. A subjectively correlated measure of nonlinear distortion is obtained for tuning a parameter for boosting low frequency outputs of one or more loudspeakers. | 05-22-2014 |
20140161265 | SELF-CALIBRATION LOUDSPEAKER SYSTEM - Systems and methods for calibrating a loudspeaker with a connection to a microphone located at a listening area in a room. The loudspeaker includes self-calibration functions to adjust speaker characteristics according to effects generated by operating the loudspeaker in the room. In one example, the microphone picks up a test signal generated by the loudspeaker and the loudspeaker uses the test signal to determine the loudspeaker frequency response. The frequency response is analyzed below a selected low frequency value for a room mode. The loudspeaker generates parameters for a digital filter to compensate for the room modes. In another example, the loudspeaker may be networked with other speakers to perform calibration functions on all of the loudspeakers in the network. | 06-12-2014 |
20140161266 | Calibration Method and Calibration Module Thereof for Vibration Device - A calibration method for a vibration module includes transmitting a plurality of vibration signals corresponding to a plurality of vibration frequencies to the vibration module and detecting a plurality of input currents or input power levels of the vibration module corresponding to the plurality of vibration frequencies; and determining a vibration point of the vibration module according to the plurality of input currents or input power levels. | 06-12-2014 |
20140177854 | SYSTEMS AND METHODS OF FREQUENCY RESPONSE CORRECTION FOR CONSUMER ELECTRONIC DEVICES - Frequency response correction systems and methods for consumer electronic (CE) devices are disclosed. Applying one or more of disclosed techniques can improve a consumer's listening experience. The frequency response of a CE device can be corrected to remove or attenuate salient, undesirable features of with minimal user interaction. Audio quality can be tuned for optimal or near optimal performance even at maximum or near maximum volume levels substantially without fluctuations, clipping, or any other distortions. In some embodiments, audio response of the CE device can be captured, smoothed, and corrected. Correction parameters can be stored on the CE device. | 06-26-2014 |
20140198920 | SYSTEM AND METHOD FOR HIGH RELIABILITY SOUND PRODUCTION - A system and method are provided for creating a loudspeaker system with low failure rate of sound production. The system uses a loudspeaker with more than one voice coil, a circuit to detect breakage of a voice coil and a switching circuit to steer the system input signal to a remaining good voice coil. | 07-17-2014 |
20140198921 | ARRANGEMENT AND METHOD FOR MEASURING THE DIRECT SOUND RADIATED BY ACOUSTICAL SOURCES - The invention provides an arrangement and a method for measuring the direct sound w | 07-17-2014 |
20140233742 | APPARATUS FOR SPEAKER AUDIO CONTROL IN A DEVICE - The electronic device has audio control for speaker channel based at least in part on an orientation and number of speakers of the electronic device. | 08-21-2014 |
20140241536 | METHOD AND DETECTOR OF LOUDSPEAKER DIAPHRAGM EXCURSION - The present invention relates in one aspect to a method of detecting diaphragm excursion of an electrodynamic loudspeaker. The method comprises steps of generating an audio signal for application to a voice coil of the electrodynamic loudspeaker and adding a high-frequency probe signal to the audio signal to generate a composite drive signal. The method further comprises a step of applying the composite drive signal to the voice coil through an output amplifier and detecting a modulation level of a probe signal current flowing through the voice coil. | 08-28-2014 |
20140270207 | Reducing Audio Distortion in an Audio System - An audio system comprises an audio driver configured to receive a target audio signal and a feedback signal and to generate an adjusted audio signal responsive to the target audio signal and the feedback signal. A loudspeaker is configured to convert the adjusted audio signal into acoustical sound. A test signal generator is configured to generate a test signal having a higher frequency than the target audio signal. The test signal causes a test current to flow through the loudspeaker. A current sensing circuit is configured to measure the test current flowing through the loudspeaker and to generate a current sense signal indicative of the test current. A feedback circuit is configured generates the feedback signal responsive to the current sense signal. | 09-18-2014 |
20140270208 | MONITORING OF SPEAKER IMPEDANCE TO DETECT PRESSURE APPLIED BETWEEN MOBILE DEVICE AND EAR - Coupling between a user's ear and a speaker of a mobile device may be determined by measuring an impedance of the speaker. When the user presses the mobile device against the user's ear, the speaker impedance changes as a result of loading in the speaker's acoustic radiation impedance. The speaker impedance change may be correlated with the force applied by the user to the mobile device. The measured speaker impedance may be provided as feedback to an adaptive noise cancellation (ANC) algorithm to adjust the output at the speaker. For example, when the mobile device is removed from the user's ear, the ANC algorithm may be muted. | 09-18-2014 |
20140270209 | SYSTEM AND METHOD FOR PRODUCING A NARROW BAND SIGNAL WITH CONTROLLABLE NARROWBAND STATISTICS FOR A USE IN TESTING A LOUDSPEAKER - An apparatus may include a signal generation module for generating a signal to test a loudspeaker. The signal generating module may be configured to receive a plurality of inputs identifying parameters relating to a test signal for the loudspeaker, generate a plurality of narrowband signals based on the plurality of inputs, sum the narrowband signals together to produce a broadband test signal, and transmit the broadband test signal to the loudspeaker to generate sound based on the broadband test signal. | 09-18-2014 |
20140286496 | PROXIMITY SENSING DEVICE CONTROL ARCHITECTURE AND DATA COMMUNICATION PROTOCOL - Mobile device speaker control may include: monitoring one or more devices coupled (e.g., wired or wirelessly) with a data network, receiving one or more data packets from each of the one or more devices, filtering received data packets by evaluating a received signal strength (e.g., RSSI) of the received packets. The received packets may be ordered in a priority based on a value, and comparing the received signal strength of each of the received packets to a threshold to determine whether the one or more devices are to perform an action; and/or detecting a device within a proximity of a speaker box coupled with a data network, filtering a data packet received from the device to determine a received signal strength associated with the device, comparing the received signal strength to a threshold, and determining whether an action is to be performed based on a result of the comparing. | 09-25-2014 |
20140307881 | Connection Diagnostics for Parallel Speakers - Connectivity of a pair of parallel electroacoustic transducers is determined by applying a first test signal on the output line at a frequency where the impedance of the transducers in parallel is less than the impedance of the higher-frequency transducer alone, and observing whether a clip signal is received. If the clip signal is not received, an error indication is output. A second test signal is applied at a frequency where the impedance of the transducers in parallel is less than the impedance of the lower-frequency transducer alone. If the clip signal is not received, the error indication is output. A third test signal is applied at a frequency where the impedance of the transducers in parallel is higher if both transducers are operational than if the higher-frequency transducer is internally short-circuited. If the clip signal is received, a third error indication is output. | 10-16-2014 |
20140334628 | BUILT-IN AUDIO APPARATUS - A built-in audio apparatus includes a speaker unit, a mode setting unit configured to selectively set the speaker unit to one of a first position and a second position, and a controller configured to control the speaker unit depending on the setting of one of the first position and the second position. The mode setting unit is configured to be disposed in a surface of a structure, and includes an opening for emitting sound outputted from the speaker unit. | 11-13-2014 |
20140341381 | LOUDSPEAKER NOISE INSPECTION METHOD, LOUDSPEAKER NOISE INSPECTION DEVICE AND RECORDING MEDIUM FOR RECORDING A LOUDSPEAKER NOISE INSPECTION PROGRAM - A loudspeaker noise inspection method is to be implemented by an electronic device and includes the steps of: obtaining a frequency sweeping audio signal from an audio output generated by a loudspeaker in response to a frequency sweeping input signal; performing differentiation upon the frequency sweeping audio signal so as to generate a differentiated frequency sweeping audio signal; and dividing the differentiated frequency sweeping audio signal by a constant which is greater than 2π times a maximum frequency of the frequency sweeping audio signal, so as to obtain an attenuated frequency sweeping audio signal for inspection of a noise pulse in the frequency sweeping audio signal. | 11-20-2014 |
20140348335 | AUDIO MEASUREMENT AMPLIFIER - A circuit for conditioning an acoustic transducer driving signal includes an inner feedback circuit having a test signal input for receiving a test signal, a feedback input for receiving a feedback signal, circuitry for forming an output signal including circuitry for amplifying the input signal according to the feedback signal, and an output for providing the output signal. The circuit also includes an outer feedback circuit having a signal input for receiving the output signal from the inner feedback circuit, a desired offset input for receiving a signal representative of a desired output offset, a first low-pass filter circuit for detecting an actual offset in the output signal, signal combination circuitry for forming the feedback signal including combining the actual offset with the desired output offset, and a feedback output for providing the feedback signal to the feedback input of the inner feedback circuit. | 11-27-2014 |
20140348336 | ELECTRONIC APPARATUS AND METHOD FOR ACTIVATING SPECIFIED FUNCTION THEREOF - An electronic apparatus and a method for activating a specified function are provided. The electronic apparatus includes a speaker, an audio signal processor and an application processor. The audio signal processor senses a variation of an acoustic condition of the speaker. The application processor is used for: generating a logic high or low signal in response to the sensed variation of the acoustic condition; interpreting the logic high or low signal as a control signal; and performing an instruction corresponding to the control signal. | 11-27-2014 |
20140348337 | DEVICE AND METHOD FOR CALCULATING LOUDSPEAKER SIGNALS FOR A PLURALITY OF LOUDSPEAKERS WHILE USING A DELAY IN THE FREQUENCY DOMAIN - A device for calculating loudspeaker signals using a plurality of audio sources, an audio source including an audio signal, includes a forward transform stage for transforming each audio signal to a spectral domain to obtain a plurality of temporally consecutive short-term spectra, a memory for storing a plurality of temporally consecutive short-term spectra for each audio signal, a memory access controller for accessing a specific short-term spectrum for a combination consisting of a loudspeaker and an audio signal based on a delay value, a filter stage for filtering the specific short-term spectrum by using a filter, so that a filtered short-term spectrum is obtained for each audio signal and loudspeaker combination, a summing stage for summing up the filtered short-term spectra for a loudspeaker to obtain summed-up short-term spectra, and a backtransform stage for backtransforming summed-up short-term spectra for the loudspeakers to a time domain to obtain the loudspeaker signals. | 11-27-2014 |
20140369512 | OBSTRUCTED PORT AUDIO SIGNAL ALTERATION - A portable electronic device has an acoustic port having an aperture in a housing having a speaker and pressure sensing transducer incorporated therein. During normal use of the portable electronic device, the aperture of the acoustic port may become obstructed during handling, holstering or surface placement, resulting in reduced sound quality and a waste of energy from a battery powering the device. The pressure sensing transducer detects an obstruction of the acoustic port by detecting an increase in acoustic pressure within the housing or within an acoustic chamber coupling the aperture of the acoustic port to the speaker. In response, acoustic characteristics of the obstructed port speaker's audio are altered to conserve power or enhance audio. Furthermore, acoustic characteristics of speakers of unobstructed acoustic port apertures of the device may also be altered in response to detection of the obstruction. | 12-18-2014 |
20150016620 | TRANSDUCER WITH MOTION CONTROL - An audio system comprises an electroacoustic transducer ( | 01-15-2015 |
20150030167 | Method of Detecting Enclosure Leakage of Enclosure Mounted Loudspeakers - A method of detecting enclosure leakage of an electrodynamic loudspeaker mounted in an enclosure or box may include applying an audio signal to a voice coil of the electrodynamic loudspeaker through an output amplifier and detecting a voice coil current flowing into the voice coil. A voltage across the voice coil may be detected and an impedance or admittance of the loudspeaker across a predetermined audio frequency range may be detected based on the detected voice coil current and voice coil voltage. A fundamental resonance frequency of the loudspeaker may be determined based on the detected impedance or admittance and compared with a nominal fundamental resonance frequency of the loudspeaker representing a sealed state of the enclosure. Acoustic leakage of the enclosure may be detected based on a deviation between the determined the fundamental resonance frequency and the nominal fundamental resonance frequency of the electrodynamic loudspeaker. | 01-29-2015 |
20150030168 | Dynamic Characterization of a Communication Device - Technology for dynamic characterization of a communication device is disclosed. One method comprises sending an acoustic characterization excitation signal to be output by an acoustic transducer in the communication device. A received acoustic coupling signal that is received by a microphone of the communication device in response to the output of the acoustic transducer is measured. An acoustic signal conditioning algorithm is applied to at least one of the microphone or the acoustic transducer to reduce an amplitude of the acoustic signal or the received acoustic coupling signal to a level below a selected threshold. | 01-29-2015 |
20150030169 | Method of Controlling Sound Reproduction of Enclosure Mounted Loudspeakers - A method of controlling sound reproduction may include applying an audio signal to a voice coil of the electrodynamic loudspeaker to produce sound, detecting one of an impedance and admittance of the loudspeaker across a predetermined audio frequency range based on a detected voice coil current and voice coil voltage and determining a fundamental resonance frequency of the loudspeaker based on the detected impedance or admittance. The fundamental resonance frequency of the loudspeaker may be compared with a nominal fundamental resonance frequency of the loudspeaker representing a nominal acoustic operating condition of the loudspeaker. A change of operating condition of the loudspeaker may be detected based on a frequency deviation between the determined fundamental resonance frequency and a nominal fundamental resonance frequency of the loudspeaker. The level of the audio signal may be attenuated in response to the frequency deviation meets a predetermined frequency error criterion. | 01-29-2015 |
20150036833 | Method and device for testing a loudspeaker arrangement - A loudspeaker arrangement includes a loudspeaker and a trigger circuit for electrically triggering the loudspeaker. The loudspeaker has a loudspeaker diaphragm for generating an acoustic signal. A digital pulse test signal is applied to the loudspeaker via the trigger circuit during a respective test sequence, the digital pulse test signal having a duty cycle that is predetermined to change such that the duty cycle increases over a plurality of periods of the test sequence at the beginning of the test sequence, and the duty cycle decreases over a plurality of periods of the test sequence at the end of the test sequence. During the respective test sequence, a measurement variable, representative of a voltage drop on a reference circuit connected in series to the loudspeaker, is detected, and the loudspeaker arrangement is classified as functional on the basis of a comparison of the measurement variable and a predetermined reference value. | 02-05-2015 |
20150043739 | CREST-FACTOR BASED GAIN MODIFICATION - A method for crest-factor based gain modification comprises sampling audio inputs to determine an energy for each input. The inputs are amplified to produce output channels. An average energy is determined for each frame by adding a percentage of a last average energy to a residual percentage of the energy. The last average energy is equal to zero for a first sampling of the audio inputs. The residual percentage is equal to one hundred minus the percentage of the last average energy. The amplifier gain is iteratively reduced by a decrease-step for a fixed period until a number of exceeding-inputs is less than or equal to a maximum. The exceeding-inputs have an average energy that exceeds a maximum-energy. The amplifier gain is iteratively increased by an increase-step for another fixed period until a number of exceeding-inputs is greater than a maximum. | 02-12-2015 |
20150055786 | Apparatus and Method of Silent Monitoring Alarm Sounders - An alarm sounder, which incorporates a piezo-electric output transducer, can be silently monitored using a variable frequency square wave. An initial frequency, close to the upper limit of human hearing, is coupled to the sounder. The transducer draws very little current at this initial frequency. The frequency of the square wave is systematically reduced, and the current draw is continually monitored. A high current indicates a low impedance type of fault. A low current throughout the frequency range indicates a potential high frequency type of fault. | 02-26-2015 |
20150078558 | SYSTEMS AND METHODS FOR DETECTION OF LOAD IMPEDANCE OF A TRANSDUCER DEVICE COUPLED TO AN AUDIO DEVICE - In accordance with systems and methods of the present disclosure, an audio device may include an electrical terminal, an audio circuit, and a transducer load detection circuit. The electrical terminal may couple a transducer device to the audio device. The audio circuit may generate an analog audio signal, wherein the analog audio signal is coupled to the electrical terminal. The transducer load detection circuit may detect a load impedance of the transducer device when the transducer device is coupled to the audio device from characteristics measured at the electrical terminal. | 03-19-2015 |
20150078559 | SYSTEMS AND METHODS FOR DETECTION OF LOAD IMPEDANCE OF A TRANSDUCER DEVICE COUPLED TO AN AUDIO DEVICE - In accordance with systems and methods of the present disclosure, an audio device may include an electrical terminal, an audio circuit, and a transducer load detection circuit. The electrical terminal may couple a transducer device to the audio device. The audio circuit may generate an analog audio signal, wherein the analog audio signal is coupled to the electrical terminal The transducer load detection circuit may detect a load impedance of the transducer device when the transducer device is coupled to the audio device from characteristics measured at the electrical terminal. | 03-19-2015 |
20150078560 | SYSTEMS AND METHODS FOR DETECTION OF LOAD IMPEDANCE OF A TRANSDUCER DEVICE COUPLED TO AN AUDIO DEVICE - In accordance with systems and methods of the present disclosure, an audio device may include an electrical terminal, an audio circuit, and a transducer load detection circuit. The electrical terminal may couple a transducer device to the audio device. The audio circuit may generate an analog audio signal, wherein the analog audio signal is coupled to the electrical terminal The transducer load detection circuit may detect a load impedance of the transducer device when the transducer device is coupled to the audio device from characteristics measured at the electrical terminal. | 03-19-2015 |
20150086027 | METHOD FOR OPERATING A LOUDSPEAKER DEVICE, LOUDSPEAKER DEVICE, AND DEVICE FOR NOISE COMPENSATION - In a method for operating a loudspeaker device having at least one loudspeaker, at least one actual membrane state parameter of a membrane of the loudspeaker is detected by a detecting device. An actual membrane state of the membrane based on the following actual membrane state parameters: actual membrane position (x | 03-26-2015 |
20150086028 | METHOD AND SYSTEM FOR CHECKING AN ACOUSTIC TRANSDUCER - The present invention relates to a method and system for checking an acoustic transducer and the audio system, wherein an inaudible silo test signal is added on top of a normal audio signal of an electronic device. A signal mix consisting of the test signal and the normal audio signal is derived and converted to a digital signal which is processed by a type of Fourier transformation, e.g. the Goertzel algorithm, to derive the magnitude of the digital signal at the test signal frequency. The derived magnitude is used to gain knowledge about the functionality of the acoustic transducer and its electrical connection to the electric device, as well as the common audio path. | 03-26-2015 |
20150086029 | APPARATUS AND METHOD FOR INHIBITING PORTABLE ELECTRONIC DEVICES - This accessory is apparatus capable of implementing a method that can affect one or more features of a portable electronic device when brought into a vehicle having a radio with a right and left speaker. The accessory has a sender for initiating transmission of an RF test signal at the portable electronic device The RF test signal is arranged to cause the radio to produce a distinct pair of audio responses from the right and left speaker. The accessory has a discriminator for determining for the right and left speaker the corresponding return delay between transmission of the RF test signal and arrival of the distinct pair of audio responses at the portable electronic device. | 03-26-2015 |
20150086030 | ELECTRONIC DEVICE AND METHOD FOR CONTROLLING THE SAME - An electronic device and methods are disclosed. A cover panel is located on a front surface of the electronic device. A piezoelectric vibration module configured to vibrate the cover panel. A drive module configured to vibrate the piezoelectric vibration module based on a sound signal. A pressure intensity acquiring module configured to acquire pressure intensity information. The pressure intensity information indicates an intensity at which an ear of a user is pressed onto the cover panel. A sound quality controller configured to control a sound quality of the sound signal based on the pressure intensity information. | 03-26-2015 |
20150117654 | APPARATUS AND METHOD FOR TESTING SOUND TRANSDUCERS - In one embodiment, an apparatus for testing sound transducers includes a test socket having at least one acoustic generator and at least one sound monitoring device integrated therein. In one embodiment, the test socket includes a well for holding the sound transducer during test, the well being in communication with the at least one acoustic generator and the at least one sound receiving device. | 04-30-2015 |
20150117655 | KENNELLY CIRCLE INTERPOLATION OF IMPEDANCE MEASUREMENTS - Embodiments of the invention are directed to systems, methods and computer program products for interpolating impedance data associated with an electronic device. The present invention enables faster electronic device impedance analysis which in turn will have an impact on memory allocation associated with a computing system that controls the electronic device. An exemplary method comprises receiving complex impedance data; converting the complex impedance data to polar impedance data, wherein the polar impedance data defines a Kennelly circle; normalizing the polar impedance data based on at least one parameter associated with the Kennelly circle; and interpolating the polar impedance data for a selected frequency. | 04-30-2015 |
20150124982 | METHOD OF ESTIMATING DIAPHRAGM EXCURSION OF A LOUDSPEAKER - A method of estimating diaphragm excursion of an electrodynamic loudspeaker may be performed using audio signals. An audio output signal may be applied to a voice coil of the electrodynamic loudspeaker through an output amplifier to produce sound. A detected voice coil current and a determined voice coil voltage may be applied to a linear adaptive digital loudspeaker model that has a plurality of adaptive loudspeaker parameters. The parameter values of the adaptive loudspeaker parameters may be computed based on the linear adaptive digital loudspeaker model and applied to a non-linear state-space model of the electrodynamic loudspeaker. For the non-linear state-space model, a predetermined non-linear function may be applied to at least one of the plurality of received parameter values to compute at least one non-linearity compensated parameter value of the adaptive loudspeaker parameters, to determine an instantaneous excursion of the diaphragm. | 05-07-2015 |
20150124983 | CIRCUIT AND METHOD FOR DRIVING A LOUDSPEAKER - A circuit for driving a loudspeaker is disclosed. The circuit includes: a signal generator connected to the loudspeaker, generating a first signal comprising a first pulse with positive value and a second pulse with negative value; a detection unit connected to the loudspeaker, detecting a second signal produced by the loudspeaker in response to the first signal; and a processing unit connected to the signal generator and the detection unit, calculating the impedance of the loudspeaker according to the second signal; wherein each pulse width of the first and second pulses is between 100 ns and 900 ns. | 05-07-2015 |
20150131806 | LOUDSPEAKER POLARITY DETECTOR - A method comprising the steps of: | 05-14-2015 |
20150296292 | MULTI-CHANNEL AUDIO SYSTEM HAVING A SHARED CURRENT SENSE ELEMENT FOR ESTIMATING INDIVIDUAL SPEAKER IMPEDANCES - A programmed data processor receives input voltage measurements for a number of speaker drivers, wherein each of the voltage measurements may be a sensed or estimated sequence of time-domain samples of a respective speaker driver input voltage that is over a different time frame. The processor obtains a sensed shared current, being a measure of current in a single power supply rail that is feeding power to each of a number of audio amplifiers, while the audio amplifiers are driving the speaker drivers in accordance with a number of audio channel signals, respectively. The processor computes an estimate of electrical input impedance for each of the speaker drivers using the sensed shared current and the input voltage measurements. Other embodiments are also described and claimed. | 10-15-2015 |
20150296293 | MULTI-CHANNEL AUDIO SYSTEM HAVING A SHARED CURRENT SENSE ELEMENT FOR ESTIMATING INDIVIDUAL SPEAKER IMPEDANCES USING TEST SIGNALS - A programmed data processor obtains a number of input voltage measurements for a number of speaker drivers, respectively, and a sensed shared current being a measure of current in a single power supply rail that is feeding power to each of a number of audio amplifiers while the audio amplifiers are driving the speaker drivers in accordance with a number of audio channel test signals, respectively. The programmed data processor computes an estimate of electrical input impedance of each of the speaker drivers using the input voltage measurement for the speaker driver and using the sensed shared current. Other embodiments are also described and claimed. | 10-15-2015 |
20150304768 | AUDIO PROCESSING DURING LOW-POWER OPERATION - A system may configure at least a low power engine (LPE) and network interface circuitry when transitioning from an active state to a low-power state. The network interface circuitry may be configured to receive information from a network and to store any received information containing audio information into a memory location. The LPE may be configured to monitor the memory location, to retrieve the stored information from the memory location, to generate audio information based on the stored information and to provide the audio information to audio circuitry for playback. It is also possible for the LPE to receive audio information from the audio circuitry, to generate information for transmission based on the audio information and to store the information into a second memory location. The network interface circuitry may then retrieve the stored information from the second memory location and transmit the information to the network. | 10-22-2015 |
20150312690 | Audio Processing Apparatus and Audio Processing Method - An audio processing apparatus includes a measuring unit adapted to output a measure-test sound from a plurality of speaker devices and measure an arriving direction of an indirect sound for the output measure-test sound, a generator adapted to generate an adjustment sound for adjusting the indirect sound, and an adjustment sound adder adapted to add the adjustment sound into a sound to be output from at least one of the plurality of speaker devices by a distribution ratio which is set based on the arriving direction of the indirect sound. | 10-29-2015 |
20150326978 | ELECTROSTATIC SPEAKER - An electrostatic speaker is described that includes a curved diaphragm positioned between two electrically conductive plates. According to aspects, the curved diaphragm has an “S-shape” and is configured to electrostatically move between the conductive plates. In particular, the curved diaphragm may generally roll between the two conductive plates so as to move from left to right with respect to ends of the conductive plates and push air in a direction toward ends of the conductive plates, thus generating acoustic output. In some implementations, the configuration of the electrostatic speaker reduces a biasing voltage required for the conductive plates. | 11-12-2015 |
20150334497 | MUTED DEVICE NOTIFICATION - An embodiment provides a method, including: detecting, at a device, a primary speaker is providing audio input; detecting, at the device, a voice data link providing audio of the primary speaker to another speaker is muted; and providing a notification to the primary speaker that the voice data link is muted. Other aspects are described and claimed. | 11-19-2015 |
20150341733 | EAR MODEL UNIT, ARTIFICIAL HEAD, AND MEASUREMENT DEVICE AND METHOD USING SAID EAR MODEL UNIT AND ARTIFICIAL HEAD - A measurement device ( | 11-26-2015 |
20150350800 | SYSTEM AND METHOD FOR TESTING - The present disclosure provides a method for testing an apparatus which comprises a set of operational subunits each comprising a moving element, wherein the moving elements move between respective first and second extreme positions, the method comprising: transferring to the apparatus stabilization control commands; transferring to the apparatus first latching-commands for latching to the first extreme position a candidate moving element which is a moving element of a candidate operational subunit; when the first latching control commands are in effect, measuring a first output frequency of an oscillator whose output is coupled to the candidate operational subunit in an electrical coupling setup which causes the output frequency of the oscillator to depend on positions of a plurality of moving elements which comprises the candidate moving element; and based on the first output frequency determining a state of the candidate operational subunit. | 12-03-2015 |
20150358734 | METHOD AND SYSTEM FOR LARGE SCALE AUDIO SYSTEM - Audio loudspeaker | 12-10-2015 |
20150365773 | Audio Direction Distance Detection - A laser device, finder of range(s), and an inclinometer are used to figure a sound producing device's position adjustment(s). Laser beam(s) of the laser device and the inclinometer characterize direction(s) of sound produced by the sound producing device. The laser beam(s) can be one or more colors or patterns each characterizing the general direction of sound produced by the sound producing device. A stadium can have many speaker housings each including a speaker, the laser, range finder and the inclinometer. Each speaker housing is mounted on, and remotely adjustable with respect to, an structural member as to the general direction of sound emitted from the speaker housing into the area for stadium seating. The inclinometer's output can be rendered by a monitor seen by an audio engineer who also uses the laser beam's direction to make adjustments to the position of the speaker housing relative to its structural member. | 12-17-2015 |
20150365774 | SELF DIAGNOSTIC SPEAKER LOAD IMPEDANCE TESTING SYSTEM - A self diagnostic loudspeaker load impedance testing system, or Push Here Diagnostic (PHD) system, located within a mixer/amplifier for testing loudspeaker connections to the mixer amplifier during installation and maintenance. The system includes a test signal source that replaces the normal audio input to the amplifier during test. A PHD analyzer within the mixer amplifier analyzes the response of the loudspeakers and related wiring to the test signal to detect a total system impedance that exceeds the amplifier rating and to detect short circuits in the wiring. The PHD analyzer illuminates an indicator when a fault occurs. The test is initiated by depressing a momentary contact switch within the mixer amplifier housing by inserting a tool through an opening in the mixer amplifier housing. | 12-17-2015 |
20150365775 | AUTOMATIC LOUDSPEAKER POLARITY DETECTION - In some embodiments, a method for automatic detection of polarity of speakers, e.g., speakers installed in cinema environments. In some embodiments, the method determines relative polarities of a set of speakers (e.g., loudspeakers and/or drivers of a multi-driver loudspeaker) using a set of microphones, including by measuring impulse responses, including an impulse response for each speaker-microphone pair; clustering the speakers into a set of groups, each group including at least two of the speakers which are similar to each other in at least one respect; and for each group, determining and analyzing cross-correlations of pairs of impulse responses (e.g., pairs of processed versions of impulse responses) of speakers in the group to determine relative polarities of the speakers. Other aspects include systems configured (e.g., programmed) to perform any embodiment of the inventive method, and computer readable media (e.g., discs) which store code for implementing any embodiment of the inventive method. | 12-17-2015 |
20150365776 | ACOUSTIC SEALING ANALYSIS SYSTEM - A device or a method using the device includes a sealing section configured to seal a user's orifice, where the sealing section is configured to produce an acoustic seal between a first side of the sealing section and a second side of the sealing section and audio processing circuitry to produce an audio signal for driving a speaker in the device and to measure sound level using output from the microphone in the device while the speaker is being driven by the audio signal. The device or method further includes control circuitry to evaluate a seal quality of the device. Other embodiments are disclosed. | 12-17-2015 |
20150373469 | OPEN TYPE SPEAKER LEAK TEST SYSTEM AND METHOD - An open-type speaker leak test system and an open-type speaker leak test method are provided for testing whether an open-type speaker has a leak. The open-type speaker includes an enclosure with an opening. The open-type speaker leak test system includes a sealing element, a vacuum generator, a first communication tube, and a pressure measuring module. The sealing element is locked into the opening. A negative pressure value of the enclosure is generated by the vacuum generator. The first communication tube is penetrated through the sealing element and in communication with the open-type speaker and the vacuum generator. An equilibrium pressure value of the enclosure is measured by the pressure measuring module. If the equilibrium pressure value is lower than a default negative pressure value, the open-type speaker has the leak. Consequently, the misjudgment is reduced, and the testing efficiency is enhanced. | 12-24-2015 |
20150382121 | SYSTEM AND METHOD FOR ROBUST SIMULTANEOUS DRIVER MEASUREMENT FOR A SPEAKER SYSTEM - A system and method for measuring the performance of a plurality of transducers integrated in one or more loudspeakers is described. The method simultaneously drives each transducer to emit sounds corresponding to distinct orthogonal test signals. A listening device senses sounds produced by the orthogonal test signals and analyzes the sensed audio signal to determine the performance of each transducer. By using orthogonal test signals, the multiple transducers may be measured and/or characterized simultaneously and with limited affect from extraneous noises. | 12-31-2015 |
20160014534 | Playback Device Calibration | 01-14-2016 |
20160014535 | Calibration State Variable | 01-14-2016 |
20160014536 | Playback Device Calibration | 01-14-2016 |
20160021473 | WIRELESS CONTROL AND CALIBRATION OF AUDIO SYSTEM - An audio system includes an enclosure, a speaker disposed in the enclosure, an audio source for providing an audio signal, and a controller. The controller is connected to the speaker and configured to drive the speaker according to the audio signal. The audio system further includes a wireless personal area network interface connected to the controller. The wireless personal area network interface can communicate with a wireless mobile device to effect settings changes for the audio system and to perform calibration for the audio system. Calibration can include near and far measurements using the microphone of the wireless mobile device. | 01-21-2016 |
20160034416 | PERIPHERAL DEVICE DIAGNOSTICS AND CONTROL OVER A TWO-WIRE COMMUNICATION BUS - Disclosed herein are systems and techniques for peripheral device diagnostics and control over a two-wire communication bus. For example, in some embodiments, a slave device may include circuitry to receive a synchronization control frame from an upstream device, receive audio data from the upstream device subsequent to receipt of the synchronization control frame, provide a synchronization response frame toward the upstream device, and provide first data representative of an operational characteristic of an audio device coupled to the slave device subsequent to provision of the synchronization response frame; circuitry to derive timing information from the synchronization control frame; and circuitry to provide the audio data to the audio device, and receive, from a sensor coupled to the slave device, second data representative of the operational characteristic of the audio device. | 02-04-2016 |
20160037275 | Isolation, Extraction and Evaluation of Transient Distortions from a Composite Signal - A method for processing a time-domain signal with transient oscillations includes: performing, by one or more computer systems, a time-frequency representation transform on the time-domain signal to obtain a plurality of coefficients for, with a coefficient corresponding to a presence of an impulse response of a filter used by the time-frequency representation transform; selecting one or more of the coefficients, with the selected one or more of the coefficients having attributes that are more indicative of the transient oscillations; and reconstructing, based on performing an inverse transform on the selected one or more coefficients, a portion of the time-domain signal that represents the transient oscillations. | 02-04-2016 |
20160037276 | METHOD OF IDENTIFYING PASSIVE RADIATOR PARAMETERS - Methods for modeling a loudspeaker having a passive radiator include applying a stimulus signal to a speaker within the cabinet, wherein the stimulus is applied over a frequency range. The sound pressure level (SPL) in the cabinet is measured as a function of frequency during application of the stimulus signal. At least one coefficient based on the measured SPL is derived, wherein at least one passive radiator parameter is a function of the at least one coefficient. | 02-04-2016 |
20160044413 | Playback Device Calibration - Systems and methods are provided for device playback calibration. An example implementation involves a computing device receiving, via a microphone, detected audio content rendered by at least one playback device. The implementation also involves the computing device modulating the detected audio content with a modulation signal such that the modulation signal has a modulation frequency determined based on an input frequency range of a processing unit. The implementation also involves providing the modulated audio content to the processing unit; and determining, via the processing unit, an equalization setting for the at least one playback device. | 02-11-2016 |
20160044421 | Piezoelectric Speaker Device - A piezoelectric speaker device that includes an organic polymer piezoelectric film, at least one pair of electrodes provided in contact with the piezoelectric film and the at least one pair of electrodes including a user-side electrode on a first side of the piezoelectric film, an insulation layer on the user-side electrode, a flaw detection electrode line on the insulation layer, and a detection circuit configured to detect whether the flaw detection electrode line is in a normal electric conduction state. | 02-11-2016 |
20160057555 | Systems and Methods for Equalizing Audio for Playback on an Electronic Device - Embodiments are provided for equalizing audio data for output by a speaker of an electronic device based on a local position or orientation of the electronic device. According to certain aspects, the electronic device can determine ( | 02-25-2016 |
20160066112 | Audio Device, Audio System, and Method - An audio device includes: an acquisition unit that acquires first information indicating an arrangement direction of a first loudspeaker, the first information being measured by a terminal device in a state with the terminal device oriented toward the first loudspeaker; and a calculation unit that calculates a position of the first loudspeaker, at least based on a distance from a reference position to the first loudspeaker, and the first information. | 03-03-2016 |
20160073210 | Microphone Calibration - Examples described herein involve calibration of a microphone of a network device based on a first signal detected by the microphone of the network device and a second audio signal detected by a microphone of the playback device. While the network device is positioned within a predetermined physical range of a microphone of a playback device, a microphone of the network device may detect a first audio signal. The network device may also receive data indicating a second audio signal detected by the microphone of the playback device. Based on data indicating the first audio signal and the data indicating the second audio signal, the network device may identify a microphone calibration algorithm, and apply the microphone calibration algorithm when performing a calibration function associated with the playback device. Similar functions may also be performed by a computing device, such as a server to coordinate calibration of the microphone of the network device. | 03-10-2016 |
20160094925 | SYSTEMS AND METHODS FOR DETERMINING METRIC FOR SOUND SYSTEM EVALUATION - Provided are a system and method for evaluating sound system performance, comprising: representing an audience space is represented on a surface of a sphere. The sphere has a center that is substantially collocated with a center of a sound system. An efficiency of the sound system is calculated by determining an amount of energy produced by the sound system that reaches the audience space projected onto the sphere relative to a total amount of energy produced by the sound system. A metric is generated for a function by normalizing the efficiency by a ratio of an area of the audience space relative to a total area of the sphere to produce a score for the performance of the sound system. | 03-31-2016 |
20160094926 | VIBRATION DETECTION COMPONENT, AND ACOUSTIC DEVICE AND INFORMATION APPARATUS USING VIBRATION DETECTION COMPONENT - A vibration detection component includes a diaphragm that has a light transparency; alight emitting element that emits light into the diaphragm at a certain inclination angle relative to a normal direction of the diaphragm; and a light receiving element that receives the light emitted from the light emitting element and reflected by an interface between the diaphragm and a medium in contact with the diaphragm and converts the light into an electric signal related to vibration of the diaphragm. | 03-31-2016 |
20160094927 | HEADPHONE DEVICE - The invention provides an apparatus that allows the user or a third party to easily monitor the volume levels of a set of headphones before and during use so as to prevent damage to the anatomy of the user's ears as a result of exposure to excessive noise volume. An analogue meter indicative of the signal level being input to or reproduced by the transducer within one or both of the headphone cans is provided, built into the outer surface of the headphone can so that it is easily visible to a user who is about to put on the headphones, or to a third party viewing the user wearing the headphones. The analogue meter is preferably indicative of sound pressure being generated by the transducer in the headphone can in which the meter is co-located, and may, for example, be a VU meter, or a PPM meter. | 03-31-2016 |
20160096475 | LIGHT/AUDIO COMPONENT COORDINATION - A visual and/or audio coordination system for coordinating the operation of multiple visual and/or audio systems/devices in multiple public safety vehicles is provided. The system includes a detection component that detects at least one vehicle and/or at least one visual and/or audio device on the at least one vehicle, a mode component in communication with the detection component that changes an operating mode of the system based on information from the detection component, an analysis component in communication with the mode component and the detection component that generates a visual and/or coordination scheme based on information from the detection component and the mode component, and an implementation component that implements the visual and/or audio coordination scheme. | 04-07-2016 |
20160100251 | ELECTRONIC DEVICE FOR GENERATION OF AN AUDIBLE ALARM OR MUSIC - The electronic device is arranged for generation of an audible alarm or music. It includes a coil or inductor and a buzzer provided with a capacitor connected in series with the coil. When the electronic device is actuated, the buzzer generates the audible alarm or music. The electronic device further includes, in a feedback loop, a derivative circuit connected to a connection node between the coil and the capacitor, to produce a derivative of the signal from the capacitor, and a comparator for comparing a derivative signal from the derivative circuit with a reference voltage. The comparator supplies an output signal to the coil to amplify the signal across the capacitor, so that the buzzer generates at least one audible alarm. | 04-07-2016 |
20160100252 | SYSTEM AND METHOD FOR DRIVING A LOW FREQUENCY SPEAKER - A control circuit configured to control a speaker is disclosed. The control circuit is configured to drive the speaker at a predetermined frequency that may correspond to a resonance frequency. The control circuit comprises a speaker driver in communication with a controller. The controller is operable to control a drive frequency of the speaker by monitoring at least a sample of each of a plurality of wavelengths of a current draw of the speaker in the form of a voltage signal. Based on the voltage signal, the controller is operable to identify a voltage differential and adjust the drive frequency of the speaker in response to the voltage differential to maintain the predetermined frequency. | 04-07-2016 |
20160112799 | ACOUSTIC SYSTEM, ACOUSTIC SYSTEM CONTROL DEVICE, AND ACOUSTIC SYSTEM CONTROL METHOD - An acoustic system includes a supply device, which is connected to a network and configured to supply an acoustic signal to the network and at least one output device configured to output a sound that is based on the acoustic signal supplied from the supply device via the network. The acoustic system also includes a detection unit configured to detect whether the at least one output device is in a state of being capable of outputting the sound and a control device configured to control, based on a result of the detection by the detection unit, to which output device the acoustic signal is to be supplied out of the at least one output device. | 04-21-2016 |
20160119715 | Monitoring and Correcting Apparatus for Mounted Transducers and Method Thereof - An apparatus comprises at least one processor and at least one memory including computer program code the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform: monitoring at least one indicator dependent on a transducer mechanical integration parameter; and determining a change in the at least one indicator. | 04-28-2016 |
20160119731 | INFORMATION PROCESSING SYSTEM, APPARATUS AND METHOD FOR MEASURING A HEAD-RELATED TRANSFER FUNCTION - Method and apparatus for measuring a Head-Related Transfer Function (HRTF) may include determining position and orientation of an object relative to an audio signal generating device having a first known position and orientation, based on tracking information indicating position and orientation of the object. Movement data indicating direction of movement to position the object at a target position and orientation in relation to a predetermined position and orientation of the audio signal generating device may be generated, according to the relative position and orientation of the object. When the object is determined to be at the target position and orientation, the HRTF may be determined based on detection at the object of an audio signal from the audio signal generating device at the first known position and orientation while the object is at the target position and orientation. | 04-28-2016 |
20160127833 | SPEAKER CONTROL DEVICE - A speaker control device in one embodiment includes a time to digital converter connected to a drive power source in series with a drive circuit for driving a plurality of coils of a speaker, the converter outputting a digital data in accordance with a voltage of the drive power source, and a monitor circuit detecting a state of the plurality of coils of the speaker based on digital data output by the time to digital converter. | 05-05-2016 |
20160134982 | SYSTEM AND METHOD FOR ESTIMATING THE DISPLACEMENT OF A SPEAKER CONE - A displacement estimation system for estimating cone displacement of a loudspeaker may include an electrical circuit including at least one non-linear component being coupled to a mechanical circuit including at least one non-linear component, and a controller programmed to determine the cone displacement of the loudspeaker based on the at least one non-linear component by using a discrete domain transfer function of a measured current of the electrical circuit, and transmit the displacement to a corrector to correct distortion of an audio signal due to the displacement. | 05-12-2016 |
20160134983 | METHOD AND SYSTEM FOR AUDIO CALIBRATION OF AN AUDIO DEVICE - A method for audio calibration of an audio device is provided. The method comprises: registering, by a microphone, a representation of an audio signal; processing, by a data processing unit, the registered representation of the audio signal into feedback image data; displaying on a display, the feedback image data; capturing, by a camera, the feedback image data displayed on the display; altering a setting affecting audio of the audio device based on the feedback image data captured by the camera. A system for audio calibration of an audio device is further provided. | 05-12-2016 |
20160150334 | APPARATUS AND METHOD FOR TESTING ACOUSTIC DEVICES - An apparatus for testing an acoustic device of a mobile terminal includes a bracket, a sound generator, a driving device, a sealing member connected to the driving device, and a plurality of first reference microphones. The driving device includes a first driving member and a second driving member. The first driving member is capable of driving the second driving member move along a first direction, and the second driving member is capable of driving the sealing member move along a second direction substantially perpendicular to the first direction, such that the sealing member is capable of moving toward or away from the acoustic device. The first reference microphones are mounted on the bracket and configured to test an leakproofness of the acoustic device when the acoustic device is sealed by the sealing member. A method for testing the acoustic device is also provided. | 05-26-2016 |
20160150335 | APPARATUS AND METHOD FOR DETECTING EARPHONE REMOVAL AND INSERTION - At least one electrical value for a plurality of frequencies is measured over a range of frequencies. An impedance is calculated based upon the at least one electrical value for each of the plurality of frequencies in the frequency range, the calculating producing a plurality of impedances. A maximum impedance from the plurality of impedances and a frequency associated with the maximum impedance are determined. The frequency is compared to a predetermined threshold, and based upon the comparing it is determined whether an earphone has been removed from the ear of a wearer. | 05-26-2016 |
20160150336 | APPARATUS AND METHOD FOR MEASURING A PLURALITY OF LOUDSPEAKERS AND MICROPHONE ARRAY - An apparatus for measuring a plurality of loudspeakers arranged at different positions includes a generator of a test signal for a loudspeaker; a microphone device configured for receiving a plurality of different sound signals in response to one or more loudspeaker signals emitted by one of the loudspeakers in response to the test signal; a controller for controlling emissions of the loudspeaker signals by the loudspeakers and for handling the different sound signals so that a set of sound signals recorded by the microphone device is associated with each loudspeaker in response to the test signal; and an evaluator for evaluating the set of sound signals for each loudspeaker to determine at least one loudspeaker characteristic for each loudspeaker and for indicating a loudspeaker state using the at least one loudspeaker characteristic. This scheme allows automatic, efficient and accurate measurement of loudspeakers arranged in a three-dimensional configuration. | 05-26-2016 |
20160157018 | AUDIO SYSTEM WITH INTEGRATED POWER, AUDIO SIGNAL AND CONTROL DISTRIBUTION | 06-02-2016 |
20160164480 | METHOD, APPARATUS, AND SYSTEM FOR ANALYSIS, EVALUATION, MEASUREMENT AND CONTROL OF AUDIO DYNAMICS PROCESSING - A method, apparatus, and system for measuring and analyzing the effects of dynamics modifying processors on a signal. This new approach utilizes statistical analysis techniques to provide a direct comparison and evaluation between the processed signal and the unprocessed signal's dynamic characteristics. The method identifies and quantifies Effective Dynamic Range, Clip Tolerance, Lower Limit Tolerance, Crest Factor, and Diminuendo Factor, using either peak or r.m.s values. In an alternative embodiment, the invention allows for user adjustment and control of the relative relationship of Crest Factor and Diminuendo Factor, which the user may perceive as loudness. | 06-09-2016 |
20160165348 | SYSTEMS AND METHODS FOR DETECTION OF LOAD IMPEDANCE OF A TRANSDUCER DEVICE COUPLED TO AN AUDIO DEVICE - In accordance with systems and methods of the present disclosure, an audio device may include an electrical terminal, an audio circuit, and a transducer load detection circuit. The electrical terminal may couple a transducer device to the audio device. The audio circuit may generate an analog audio signal, wherein the analog audio signal is coupled to the electrical terminal. The transducer load detection circuit may detect a load impedance of the transducer device when the transducer device is coupled to the audio device from characteristics measured at the electrical terminal. | 06-09-2016 |
20160183002 | REDUCING AUDIO DISTORTION IN AN AUDIO SYSTEM | 06-23-2016 |
20160192096 | SYSTEM AND METHOD FOR TESTING AND CERTIFICATION OF MEDIA DEVICES FOR USE WITHIN A CONNECTED MEDIA ENVIRONMENT - In accordance with an embodiment, described herein is a system and method for testing and certification of media devices for use within a connected media environment. A testing device includes an input mechanism, for example a microphone, and a plurality of test files. Each test file can be used to produce a characteristic signal, for example an audio track having a particular frequency. The testing device emulates a gateway between a media device under test, such as an audio speaker, and a media server. Test scripts can be used to mimic commands to play or otherwise access media content at the device under test. Playback of a particular test file can be detected and recognized according to the characteristic signal produced by that test file. Resultant test information can be used to evaluate the performance and/or certify operation of the media device within the connected media environment. | 06-30-2016 |
20160192537 | Speaker Cooling - Embodiments are provided for cooling one or more components of a playback device using speaker vibrations that result from inaudible audio. Movement of air molecules arising from the speaker vibrations may disperse heat away from the one or more components of a playback device. In an example implementation, while playing audible audio content via the at least one speaker, a playback device may receive input data indicating an instruction to stop playback of the audible audio content. The playback device may determine that playback of the audible audio content has stopped and based on that determination, play inaudible audio content to cause the at least one speaker to vibrate thereby inducing air movement within the playback device. | 06-30-2016 |
20160198269 | HEADPHONE | 07-07-2016 |
20160198275 | AUTOMATIC AUDIO SYSTEM EQUALIZING | 07-07-2016 |
20180026600 | SPEAKER DEVICE AND METHOD FOR REDUCING DISTORTION DEGREE OF SPEAKER | 01-25-2018 |
20180027321 | LOUDSPEAKER ENCLOSURE WITH A SEALED ACOUSTIC SUSPENSION CHAMBER | 01-25-2018 |
20190149925 | SPEAKER WITH FLEX CIRCUIT ACOUSTIC RADIATOR | 05-16-2019 |
20220141580 | ACOUSTIC TRANSDUCER AND DRIVING METHOD THEREOF - An embodiment of the present disclosure provides a method for driving an acoustic transducer, including: obtaining a reference electrical signal according to a first electrical signal output by a first acoustic transducer element in a case where sound waves are not received by the first acoustic transducer element; obtaining an actual detected electrical signal according to a second electrical signal output by a second acoustic transducer element in a case where sound waves are received by the second acoustic transducer element; and performing a noise reduction process on the actual detected electrical signal according to the reference electrical signal to obtain a noise-reduced signal as a final output electrical signal of the second acoustic transducer element in a case where sound waves are received by the second acoustic transducer element. An embodiment of the present disclosure further provides an acoustic transducer. | 05-05-2022 |