Patent application number | Description | Published |
20120140943 | OVERSIGHT CONTROL OF AN ADAPTIVE NOISE CANCELER IN A PERSONAL AUDIO DEVICE - A personal audio device, such as a wireless telephone, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone is also provided proximate the speaker to measure the ambient sounds and transducer output near the transducer, thus providing an indication of the effectiveness of the noise canceling. A processing circuit uses the reference and/or error microphone, optionally along with a microphone provided for capturing near-end speech, to determine whether the ANC circuit is incorrectly adapting or may incorrectly adapt to the instant acoustic environment and/or whether the anti-noise signal may be incorrect and/or disruptive and then take action in the processing circuit to prevent or remedy such conditions. | 06-07-2012 |
20120308021 | SPEAKER DAMAGE PREVENTION IN ADAPTIVE NOISE-CANCELING PERSONAL AUDIO DEVICES - A personal audio device, such as a wireless telephone, includes noise canceling circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. A processing circuit monitors a level of the anti-noise signal, determines that the anti-noise signal may cause damage to the transducer and adjusts the generation of the anti-noise signal such that damage to the transducer is prevented. | 12-06-2012 |
20120308025 | ADAPTIVE NOISE CANCELING ARCHITECTURE FOR A PERSONAL AUDIO DEVICE - A personal audio device, such as a wireless telephone, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from a reference microphone signal that measures the ambient audio and an error microphone signal that measures the output of an output transducer plus any ambient audio at that location and injects the anti-noise signal at the transducer output to cause cancellation of ambient audio sounds. A processing circuit uses the reference and error microphone to generate the anti-noise signal, which can be generated by an adaptive filter operating at a multiple of the ANC coefficient update rate. Downlink audio can be combined with the high data rate anti-noise signal by interpolation. High-pass filters in the control paths reduce DC offset in the ANC circuits, and ANC coefficient adaptation can be halted when downlink audio is not detected. | 12-06-2012 |
20120308026 | FILTER ARCHITECTURE FOR AN ADAPTIVE NOISE CANCELER IN A PERSONAL AUDIO DEVICE - A personal audio device, such as a wireless telephone, includes an adaptive noise canceling (ANC) circuit that generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cancel ambient audio sounds. A processing circuit implements one or more adaptive filters that control the generation of the anti-noise signal. At least one of the adaptive filters is partitioned into a first portion having a fixed frequency response and a second portion having a variable frequency response. The partitioned filter may be an adaptive filter that generates the anti-noise signal directly from the reference microphone signal. An error microphone may be provided to measure the ambient sounds and transducer output near the transducer, and a secondary path adaptive filter included to generate an error signal from the error microphone signal, which may be partitioned, alone or in combination. | 12-06-2012 |
20120310640 | MIC COVERING DETECTION IN PERSONAL AUDIO DEVICES - A personal audio device, such as a wireless telephone, includes noise canceling circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone may also be provided proximate the speaker to estimate an electro-acoustical path from the noise canceling circuit through the transducer. A processing circuit uses the reference and/or error microphone, optionally along with a microphone provided for capturing near-end speech, to determine whether one of the reference or error microphones is obstructed by comparing their received signal content and takes action to avoid generation of erroneous anti-noise. | 12-06-2012 |
20130287218 | LEAKAGE-MODELING ADAPTIVE NOISE CANCELING FOR EARSPEAKERS - A personal audio device, such as a headphone, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from a reference microphone signal that measures the ambient audio, and the anti-noise signal is combined with source audio to provide an output for a speaker. The anti-noise signal causes cancellation of ambient audio sounds that appear at the reference microphone. A processing circuit uses the reference microphone to generate the anti-noise signal, which can be generated by an adaptive filter. The processing circuit also models an acoustic leakage path from the transducer to the reference microphone and removes elements of the source audio appearing at the reference microphone signal due to the acoustic output of the speaker. Another adaptive filter can be used to model the acoustic leakage path. | 10-31-2013 |
20130287219 | COORDINATED CONTROL OF ADAPTIVE NOISE CANCELLATION (ANC) AMONG EARSPEAKER CHANNELS - A personal audio device including earspeakers, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal for each earspeaker from at least one microphone signal that measures the ambient audio, and the anti-noise signals are combined with source audio to provide outputs for the earspeakers. The anti-noise signals cause cancellation of ambient audio sounds at the respective earspeakers. A processing circuit uses the microphone signal(s) to generate the anti-noise signals, which can be generated by adaptive filters. The processing circuit controls adaptation of the adaptive filters such that when an event requiring action on the adaptation of one of the adaptive filters is detected, action is taken on the other one of the adaptive filters. Another feature of the ANC system uses microphone signals provided at both of the earspeakers to perform processing on a voice microphone signal that receives speech of the user. | 10-31-2013 |
20130301842 | NOISE BURST ADAPTATION OF SECONDARY PATH ADAPTIVE RESPONSE IN NOISE-CANCELING PERSONAL AUDIO DEVICES - A personal audio device, such as a wireless telephone, generates an anti-noise signal from an error microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. The error microphone is also provided proximate the speaker to provide an error signal indicative of the effectiveness of the noise cancellation. A secondary path estimating adaptive filter is used to estimate the electro-acoustical path from the noise canceling circuit through the transducer so that source audio can be removed from the error signal. Noise bursts are injected intermittently and the adaptation of the secondary path estimating adaptive filter controlled, so that the secondary path estimate can be maintained irrespective of the presence and amplitude of the source audio. | 11-14-2013 |
20130301846 | FREQUENCY AND DIRECTION-DEPENDENT AMBIENT SOUND HANDLING IN PERSONAL AUDIO DEVICES HAVING ADAPTIVE NOISE CANCELLATION (ANC) - A personal audio device, such as a wireless telephone, includes noise canceling circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone may also be provided proximate the speaker to measure the output of the transducer in order to control the adaptation of the anti-noise signal and to estimate an electro-acoustical path from the noise canceling circuit through the transducer. A processing circuit that performs the adaptive noise canceling (ANC) function also detects frequency-dependent characteristics in and/or direction of the ambient sounds and alters adaptation of the noise canceling circuit in response to the detection. | 11-14-2013 |
20130301847 | SEQUENCED ADAPTATION OF ANTI-NOISE GENERATOR RESPONSE AND SECONDARY PATH RESPONSE IN AN ADAPTIVE NOISE CANCELING SYSTEM - A personal audio device, such as a wireless telephone, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone is also provided proximate to the speaker to provide an error signal indicative of the effectiveness of the noise cancellation. A secondary path estimating adaptive filter is used to estimate the electro-acoustical path from the noise canceling circuit through the transducer so that source audio can be removed from the error signal. Adaptation of adaptive filters is sequenced so that update of their coefficients does not cause instability or error in the update. A level of the source audio with respect to the ambient audio can be determined to determine whether the system may generate erroneous anti-noise and/or become unstable. | 11-14-2013 |
20130301848 | DOWNLINK TONE DETECTION AND ADAPTATION OF A SECONDARY PATH RESPONSE MODEL IN AN ADAPTIVE NOISE CANCELING SYSTEM - An adaptive noise canceling (ANC) circuit adaptively generates an anti-noise signal from a reference microphone signal that is injected into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone proximate the speaker provides an error signal. A secondary path estimating adaptive filter estimates the electro-acoustical path from the noise canceling circuit through the transducer so that source audio can be removed from the error signal. Tones in the source audio, such as remote ringtones, present in downlink audio during initiation of a telephone call, are detected by a tone detector using accumulated tone persistence and non-silence hangover counting, and adaptation of the secondary path estimating adaptive filter is halted to prevent adapting to the tones. Adaptation of the adaptive filters is then sequenced so any disruption of the secondary path adaptive filter response is removed before allowing the anti-noise generating filter to adapt. | 11-14-2013 |
20130301849 | ERROR-SIGNAL CONTENT CONTROLLED ADAPTATION OF SECONDARY AND LEAKAGE PATH MODELS IN NOISE-CANCELING PERSONAL AUDIO DEVICES - A personal audio device, such as a wireless telephone, generates an anti-noise signal from a microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. The microphone measures the ambient environment, but also contains a component due to the transducer acoustic output. An adaptive filter is used to estimate the electro-acoustical path from the noise-canceling circuit through the transducer to the at least one microphone so that source audio can be removed from the microphone signal. A determination of the relative amount of the ambient sounds present in the microphone signal versus the amount of the transducer output of the source audio present in the microphone signal is made to determine whether to update the adaptive response. | 11-14-2013 |
20140270222 | LOW-LATENCY MULTI-DRIVER ADAPTIVE NOISE CANCELING (ANC) SYSTEM FOR A PERSONAL AUDIO DEVICE - A personal audio device including multiple output transducers for reproducing different frequency bands of a source audio signal, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal for each of the transducers from at least one microphone signal that measures the ambient audio to generate anti-noise signals. The anti-noise signals are generated by separate adaptive filters such that the anti-noise signals cause substantial cancellation of the ambient audio at their corresponding transducers. The use of separate adaptive filters provides low-latency operation, since a crossover is not needed to split the anti-noise into the appropriate frequency bands. The adaptive filters can be implemented or biased to generate anti-noise only in the frequency band corresponding to the particular adaptive filter. The anti-noise signals are combined with source audio of the appropriate frequency band to provide outputs for the corresponding transducers. | 09-18-2014 |
20140270223 | ADAPTIVE-NOISE CANCELING (ANC) EFFECTIVENESS ESTIMATION AND CORRECTION IN A PERSONAL AUDIO DEVICE - Techniques for estimating adaptive noise canceling (ANC) performance in a personal audio device, such as a wireless telephone, provide robustness of operation by triggering corrective action when ANC performance is low, and/or by saving a state of the ANC system when ANC performance is high. An anti-noise signal is generated from a reference microphone signal and is provided to an output transducer along with program audio. A measure of ANC gain is determined by computing a ratio of a first indication of magnitude of an error microphone signal that provides a measure of the ambient sounds and program audio heard by the listener including the effects of the anti-noise, to a second indication of magnitude of the error microphone signal without the effects of the anti-noise. The ratio can be determined for different frequency bands in order to determine whether particular adaptive filters are trained properly. | 09-18-2014 |
20140270224 | AMBIENT NOISE-BASED ADAPTATION OF SECONDARY PATH ADAPTIVE RESPONSE IN NOISE-CANCELING PERSONAL AUDIO DEVICES - An adaptive noise canceller adapts a secondary path modeling response using ambient noise, rather than using another noise source or source audio as a training source. Anti-noise generated from a reference microphone signal using a first adaptive filter is used as the training signal for training the secondary path response. Ambient noise at the error microphone is removed from an error microphone signal, so that only anti-noise remains. A primary path modeling adaptive filter is used to modify the reference microphone signal to generate a source of ambient noise that is correlated with the ambient noise present at the error microphone, which is then subtracted from the error microphone signal to generate the error signal. The primary path modeling adaptive filter is previously adapted by minimizing components of the error microphone signal appearing in an output of the primary path adaptive filter while the anti-noise signal is muted. | 09-18-2014 |
20150104032 | MIC COVERING DETECTION IN PERSONAL AUDIO DEVICES - A personal audio device, such as a wireless telephone, includes noise canceling circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone may also be provided proximate the speaker to estimate an electro-acoustical path from the noise canceling circuit through the transducer. A processing circuit uses the reference and/or error microphone, optionally along with a microphone provided for capturing near-end speech, to determine whether one of the reference or error microphones is obstructed by comparing their received signal content and takes action to avoid generation of erroneous anti-noise. | 04-16-2015 |
20150189434 | COORDINATED GAIN CONTROL IN ADAPTIVE NOISE CANCELLATION (ANC) FOR EARSPEAKERS - A personal audio device including earspeakers, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal for each earspeaker from at least one microphone signal that measures the ambient audio, and the anti-noise signals are combined with source audio to provide outputs for the earspeakers. The anti-noise signals cause cancellation of ambient audio sounds at the respective earspeakers. A processing circuit uses the microphone signal(s) to generate the anti-noise signals, which can be generated by adaptive filters. The processing circuit controls adaptation of the adaptive filters such that when the processing circuit detects that either of the earspeakers are off-ear, a gain applied to the anti-noise signals is reduced. | 07-02-2015 |
20150256660 | FREQUENCY-DEPENDENT SIDETONE CALIBRATION - A personal audio device includes a sidetone circuit with one or more adjustable coefficients that generates a sidetone signal from the output of a first microphone. The sidetone circuit has one or more adjustable coefficients for altering the relationship between the first microphone signal and the sidetone signal. The personal audio device also includes a transducer for reproducing playback audio and the sidetone signal at an ear of a listener and a second microphone for measuring the output of the transducer as delivered to the ear of the listener. The sidetone circuit includes a calibration circuit for estimating a response of the second microphone to the sidetone signal and adjusting the coefficient of the sidetone circuit according to the estimated response. | 09-10-2015 |
20150269926 | SOURCE AUDIO ACOUSTIC LEAKAGE DETECTION AND MANAGEMENT IN AN ADAPTIVE NOISE CANCELING SYSTEM - A personal audio device, such as a wireless telephone, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone is also provided proximate to the speaker to provide an error signal indicative of the effectiveness of the noise cancellation. A secondary path estimating adaptive filter is used to estimate the electro-acoustical path from the noise canceling circuit through the transducer so that source audio can be removed from the error signal. A level of the source audio with respect to the ambient audio is determined to determine whether the system may generate erroneous anti-noise and/or become unstable. | 09-24-2015 |
20160063988 | OVERSIGHT CONTROL OF AN ADAPTIVE NOISE CANCELER IN A PERSONAL AUDIO DEVICE - A personal audio device, such as a wireless telephone, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone is also provided proximate the speaker to measure the ambient sounds and transducer output near the transducer, thus providing an indication of the effectiveness of the noise canceling. A processing circuit uses the reference and/or error microphone, optionally along with a microphone provided for capturing near-end speech, to determine whether the ANC circuit is incorrectly adapting or may incorrectly adapt to the instant acoustic environment and/or whether the anti-noise signal may be incorrect and/or disruptive and then take action in the processing circuit to prevent or remedy such conditions. | 03-03-2016 |
Patent application number | Description | Published |
20130024204 | WEB BASED ELECTRONIC CONTROLLED SUBSTANCE ORDERING SYSTEM - A Controlled Substance (CS) ordering system that includes: 1) a client interface operable to be hosted on an Internet site, the client interface operable to receive an order for a controlled substance; 2) a first server operable to support the client interface and post a signed order to a second server; 3) the second server, the first server and the second server operable to communicate securely within a secure zone, the second server protected from external communications by the first server, the second server operable to perform signature validation functions, including checking a revocation list via the external agency validation server, and then securely posts the results back to the first server; 4) a secured database server wherein signed validated orders are posted for fulfillment and reporting; and 5) an interface with an external agency validation server, the second server operable to establish an LDAP connection to the external agency validation server. | 01-24-2013 |
20130036057 | WEB-BASED ELECTRONIC CONTROLLED SUBSTANCE TRANSFER MANAGEMENT SYSTEM AND METHOD - A Web-based Electronic Controlled Substance (CS) Transfer Management System and Method designed to fully comply with the DEA requirements for a prescription of controlled substances. The system and method allows the buyer to securely order and confirm the receipt of the controlled substances over an existing Internet infrastructure of the buyer such as a Web browser as the buyer's software, thus avoiding the necessity of any additional proprietary software or hardware to be built and installed onto the buyer's computer. The system and method further utilizes various validation functions, related to signing the controlled substance prescription with the utilization of the PKI certificate therefore, completely eliminating the necessity of the paper DEA 222 Form. The transfer of the controlled substances is managed through a secured database server, wherein signed validated orders are posted for fulfillment and reporting to the DEA. | 02-07-2013 |
20150254676 | WEB-BASED ELECTRONIC CONTROLLED SUBSTANCE TRANSFER MANAGEMENT SYSTEM AND METHOD - A Web-based Electronic Controlled Substance (CS) Transfer Management System and Method designed to fully comply with the DEA requirements for a prescription of controlled substances. The system and method allows the buyer to securely order and confirm the receipt of the controlled substances over an existing Internet infrastructure of the buyer such as a Web browser as the buyer's software, thus avoiding the necessity of any additional proprietary software or hardware to be built and installed onto the buyer's computer. The system and method further utilizes various validation functions, related to signing the controlled substance prescription with the utilization of the PKI certificate therefore, completely eliminating the necessity of the paper DEA 222 Form. The transfer of the controlled substances is managed through a secured database server, wherein signed validated orders are posted for fulfillment and reporting to the DEA. | 09-10-2015 |
20160110784 | WEB-BASED ELECTRONIC CONTROLLED SUBSTANCE TRANSFER MANAGEMENT SYSTEM AND METHOD - A Web-based Electronic Controlled Substance (CS) Transfer Management System and Method designed to fully comply with the DEA requirements for a prescription of controlled substances. The system and method allows the buyer to securely order and confirm the receipt of the controlled substances over an existing Internet infrastructure of the buyer such as a Web browser as the buyer's software, thus avoiding the necessity of any additional proprietary software or hardware to be built and installed onto the buyer's computer. The system and method further utilizes various validation functions, related to signing the controlled substance prescription with the utilization of the PKI certificate therefore, completely eliminating the necessity of the paper DEA 222 Form. The transfer of the controlled substances is managed through a secured database server, wherein signed validated orders are posted for fulfillment and reporting to the DEA. | 04-21-2016 |
Patent application number | Description | Published |
20110085300 | COMMUNICATIONS CABINET WITH PROJECTILE RESISTANT VENTS - A communications cabinet includes a housing defining a location for mounting communications equipment, the housing having a wall formed of a first material with a first penetration resistance, a vent opening in the wall, and a door. At least one plate of material having a second penetration resistance greater than or about equal to the first penetration resistance is mounted between the vent opening and the location for mounting the communications equipment, and the plate is positioned to stop projectiles larger than a given size from traveling in a straight line from the at least one vent opening to the location for mounting communication equipment while leaving an airflow path from the vent opening to the location for mounting the communications equipment that passes around at least one edge of the plate of material through a gap between the at least one plate and the wall. | 04-14-2011 |
20110086589 | OUTDOOR COMMUNICATION CABINET INCLUDING FAN TRAY AND FILTER AND METHOD OF DETECTING BLOCKAGE OF COMMUNICATION CABINET FILTER - An outdoor communication cabinet includes a housing having a interior, an opening into the interior and a door connected to the housing at the opening that includes a first aperture and a first fan tray with a plurality of fans, the fan tray being hingedly connected to the door for movement between first and second positions relative to the first aperture. Also a method of detecting blockage of filters in a communication cabinet. | 04-14-2011 |
20120190292 | ENCLOSURE AND METHOD OF COOLING SAME USING AMBIENT AIR - An enclosure houses heat-producing equipment and includes an air conditioner, a fan, and at least one controller for controlling the air conditioner and the fan. The controller runs the air conditioner when a temperature of the interior is greater than or equal to an on temperature and turns the air conditioner off when the temperature of the interior is less than or equal to an off temperature. If the ambient temperature outside the enclosure is less than the off temperature and the air conditioner is off, the controller turns the fan on until the temperature of the interior is less than the off temperature by a first amount and then turns the fan off. Also a method for controlling the temperature of an enclosure using an air conditioner and a fan. | 07-26-2012 |
20120219262 | Optical Fiber Management Drawer with Slack Management Features - A fiber management device includes a support member including a first connector for releasably securing a first sidewall portion of an optical fiber bundle to the support member at a first fixed location and a drawer mounted for sliding movement relative to the support member, the drawer including a mounting surface, a plurality of fiber guiding components mounted on the mounting surface, and a second connector for releasably securing a second sidewall portion of the optical fiber bundle to the drawer at a second fixed location. | 08-30-2012 |
20130111937 | COOLING MODULE FOR MODULAR DATA CENTER AND SYSTEM COMPRISING THE COOLING MODULE AND AT LEAST ONE SERVER MODULE - A cooling module for cooling at least two server modules that are configured to house a plurality of servers, the cooling module including a housing having an interior containing air, an intake into the housing, an outlet from the housing, at least one fan configured to move the air from the intake to the outlet and at least one sprayer configured to spray a mist into the air in the interior for evaporative cooling of the interior. Also a system formed of the cooling module, first and second server modules and a plenum connecting the outlet of the cooling module and intakes of the first and second server modules. | 05-09-2013 |
20150017937 | RRH CONCEALMENT MODULE/METHODS IN NATURAL CONVECTION - Disclosed is an apparatus with a concealment module, the concealment module including an inlet panel and an outlet panel, the outlet panel located higher than the inlet panel. Also included is a remote radio head disposed with the concealment module, mounted on a support, and located between the inlet panel and the outlet panel. A first baffle is located under the remote radio head to prevent cool air from the inlet panel from being diverted to a space between the remote radio head and the support. A second baffle is located to direct cooling air over a back of the remote radio head. A third baffle is located on top of the remote radio head to direct heated cooling air to the outlet panel. A fourth baffle is located to direct cooling air over the front of the remote radio head. | 01-15-2015 |
20150057047 | MODULAR SMALL CELL ARCHITECTURE - A wireless communication system is provided. The system includes a common module, is shaped as a sector of a cylinder and has a power supply. A sector radio module is coupled to the power supply and includes an access radio and an access antenna. The access antenna is configured to serve a sector of not more than 180°, and is also shaped as a sector of a cylinder. | 02-26-2015 |