Class / Patent application number | Description | Number of patent applications / Date published |
381346000 | Acoustic resistance | 22 |
20090316944 | In-the-ear porting structures for earbug - Systems, apparatus and methods are discussed for controlling resonance in in-the-ear headphones. Resonance effects resulting from wave reflection and superposition can occur in the cavity formed by the port tube of an earbud and the wearer's ear canal. In this invention, acoustically resistive structures are provided to create sound diffusion in the cavity. In one embodiment, a spring coil with several adjustable parameters is inserted into the port tube. In another embodiment, a pattern of grooves is carved into the inner surface of the port tube. Porous filters can also be used in conjunction with both of the embodiments described above. The result of providing the resistive structures in an earbud is a flattened cavity frequency response and improved sound quality. | 12-24-2009 |
20100142742 | MICROPHONE UNIT - A microphone unit includes: a housing; a diaphragm which is disposed in the inside of the housing; and an electric circuit portion which processes an electric signal that is generated based on a vibration of the diaphragm. In the housing, a first sound guide space which guides a sound outside the housing to a first surface of the diaphragm via a first sound hole and a second sound guide space which guides a sound outside the housing to a second surface, that is, an opposite surface of the diaphragm via a second sound hole are formed. The electric circuit portion is disposed in either one of the first sound guide space and the second sound guide space; and an acoustic resistance portion which adjusts at least one of a frequency characteristic of the first sound guide space and a frequency characteristic of the second sound guide space is formed. | 06-10-2010 |
20100142743 | VOICE INPUT APPARATUS - A microphone unit is disposed in the inside of a first housing of a voice input apparatus. The microphone unit includes: a second housing; a diaphragm which is disposed in the inside of the second housing; and an electric circuit portion which processes an electric signal that is generated based on a vibration of the diaphragm. In the voice input apparatus, a first sound guide space which guides a sound outside the first housing to a first surface of the diaphragm and a second sound guide space which guides a sound outside the first housing to a second surface of the diaphragm are formed. The electric circuit portion is disposed in either one of the first sound guide space and the second sound guide space; and an acoustic resistance portion which adjusts at least one of a frequency characteristic of the first sound guide space and a frequency characteristic of the second sound guide space is formed. | 06-10-2010 |
20110051970 | HIGH OUTPUT LOUDSPEAKER - A loudspeaker system includes a speaker enclosure having an opening in a front wall, and a speaker manifold mounted within the speaker enclosure and communicating with the opening. The speaker manifold includes a pair of substantially parallel side walls, a back wall, and top and bottom walls, defining a manifold chamber. The wall opposite the back wall is substantially open to define a manifold opening and to permit the communicating. The manifold opening is substantially in alignment with the front wall opening. A woofer is mounted on a first wall of the speaker manifold. An acoustic vent is mounted on a second wall of the manifold, such that the woofer and the acoustic vent face each other at one of about a 180 degree angle or about a 90 degree angle. | 03-03-2011 |
20120063627 | Loudspeaker Device - An object of the present invention is to provide a loudspeaker device which has a high moisture resistance and can further widens an audio range of low-frequency range sounds. To achieve the above object, a closed box loudspeaker device of the present invention includes a loudspeaker unit which is attached to an opening in a box and activated carbon fiber which is provided in the box to adsorb gas. The activated carbon fiber has plural pores, which are exposed on a surface of the activated carbon fiber and have a diameter of 2.0 nm or less, and a volume of the pores having the diameter of 2.0 nm or less occupies 60% or more of a volume of the entire pores, so that the loudspeaker device which simultaneously achieves both an enhancement of the moisture resistance and the widening of the audio range of the low-frequency range sounds can be provided. | 03-15-2012 |
20120128190 | GAS FILLED SPEAKER VOLUME - A speaker enclosure includes a gas cavity and an air cavity separated by a flexible membrane. A diaphragm is located roughly in an opening of the enclosure surrounding the gas cavity and attached to the enclosure by an outer suspension member. The enclosure, the flexible membrane, the diaphragm, and the outer suspension member are gas and air impermeable. The enclosure surrounding the air cavity has a vent hole to allow air to travel into and out of the air cavity for barometric pressure equalization of the gas cavity. Other embodiments are also described and claimed. | 05-24-2012 |
20130058514 | Dynamic Microphone Unit and Dynamic Microphone - A dynamic microphone unit includes a diaphragm vibrating in response to received sound waves; a voice coil fixed to the diaphragm; a magnetic circuit generating magnetism in a magnetic gap where the voice coil is disposed; and an acoustic resistor disposed in a space adjacent to the reverse of the diaphragm. The acoustic resistor includes a cover disposed between a felt and the diaphragm. A case having an open end and a closed end accommodates the felt and the cover. The cover has holes transmitting sound waves at the closed end and a bending portion at the open end which urges the cover and the felt. | 03-07-2013 |
20130216084 | UNIDIRECTIONAL CONDENSER MICROPHONE AND METHOD FOR ADJUSTING ACOUSTIC RESISTANCE - To provide an insulator, which supports a fixed pole in a unidirectional condenser microphone in a shareable manner among microphones that are different in the distance between acoustic terminals from one another. Coarse adjustment is performed on an insulator | 08-22-2013 |
20130308812 | MICRO-SPEAKER BOX - A micro-speaker box includes a cabinet with a cavity room, a speaker unit, an amount of adsorbents located in the inside of the cabinet, and a porous layer arranged in the cavity room and dividing the cavity room of the cabinet into twp parts, one part for accommodating the speaker unit, the other part filled with the adsorbents. The porous layer defines an acoustical airflow resistance no more than 150 MKS Rayls, and includes billions of stomas. The stomas in the porous layer have diameters in the range of 1 um to 500 um. | 11-21-2013 |
20140037119 | ACOUSTIC SPEAKER DEVICE - An acoustic speaker device ( | 02-06-2014 |
20140064540 | Loudspeaker System - A loudspeaker system with an enclosure, an electro-acoustic transducer mounted in the enclosure so as to leave space inside of the enclosure that is unoccupied by the transducer, and an air-adsorbing material in the space inside of the enclosure that is unoccupied by the transducer. The air-adsorbing material includes a silicon-based zeolite with a small amount of a second metal. The mole ratio of silicon to the second metal is at least about 200 and is less than 400. | 03-06-2014 |
20140072161 | Combining and Waterproofing Headphone Port Exits - A plate attached to the back shell of an earphone includes an exit cavity corresponding in dimension to and aligned with a first opening through the back shell. A channel in the bottom surface of the plate begins at a point aligned with a second opening through the back shell and ends at an aperture through a side wall of the exit cavity. The channel and the outer surface of the back shell together form a reactive acoustic port from a back cavity enclosed by the back shell to the exit cavity, the first opening through the shell forms a resistive acoustic port from the back cavity to the exit cavity, and the exit cavity couples the reactive acoustic port and the resistive acoustic port to free space without introducing additional acoustic impedance. In some examples, a water-resistant screen covers the upper aperture of the exit cavity. | 03-13-2014 |
20140093113 | SPEAKER ASSEMBLY - Examples of speaker assemblies are described. A speaker assembly according to some embodiments may include a speaker enclosure with a first opening (e.g., a speaker opening) and a second opening (e.g. a bass reflex port), a speaker unit mounted to the enclosure at the first opening, and an acoustic damping mechanism mounted to the enclosure at the second opening. The acoustic damping mechanism may be a dual-layer mesh screen including a first mesh with a first acoustic resistance (AR) for providing acoustic damping, and a second mesh with a second AR lower than the first AR. The second mesh may be nearly acoustically transparent and may serve to increase the stiffness of the first mesh. The first mesh may be bonded to the second mesh, and the dual-layer mesh screen may be coupled to the bass reflex port for reducing noise associated with turbulence at the port. | 04-03-2014 |
20150071475 | DECORATIVE FLAT PANEL SOUND SYSTEM - A flat panel sound system ( | 03-12-2015 |
20150092974 | Microphone Having Closed Cell Foam Body - A microphone | 04-02-2015 |
20150358721 | ACOUSTIC DEVICE - An acoustic device includes a cabinet with a cavity room, a speaker unit mounted in the cavity room of the cabinet, a sealed room formed by the cabinet together with the speaker unit, a predetermined amount of nonpolarity gas which is sealed in the sealed room, a predetermined amount of zeolite absorbent which is sealed in the sealed room and physically absorbing the nonpolarity gas so as to decrease a resonant frequency of the sealed room and increase low frequency resonance of speaker unit. | 12-10-2015 |
20150382102 | DYNAMIC MICROPHONE AND METHOD OF FORMING BACK-SIDE AIR CHAMBER - A dynamic microphone which prevents a wall forming a back-side air chamber from having a certain resonance frequency and effectively prevents the generation of standing waves in the back-side air chamber is provided. A dynamic microphone includes a dynamic microphone unit including a diaphragm configured with a voice coil and a magnetic circuit having a magnetic gap provided so as to allow the voice coil to vibrate, a bottomed case which is coupled to the dynamic microphone unit and forms a back-side air chamber communicating with back side of the diaphragm, and an acoustic resistance body which is pressingly attached in the case and composed of metal fiber including a pocket, an open cross sectional area of the pocket gradually decreasing toward the direction remote from the dynamic microphone unit. | 12-31-2015 |
20160014499 | ACOUSTIC FILTER | 01-14-2016 |
20160100246 | UNIDIRECTIONAL CONDENSER MICROPHONE UNIT - A unidirectional condenser microphone includes a first and second condenser elements each having a diaphragm and a fixed electrode disposed opposite the diaphragm, an insulating base having an opening at the center thereof and supporting the respective fixed electrodes of the first and second condenser elements at opposite sides of the insulating base, acoustic resistance materials covering both ends of the opening, and air chambers formed respectively between each of the fixed electrodes and the insulating base, such that respective back sides of the diaphragms of the first and the second condenser elements are acoustically in communication with each other, wherein the diaphragm of the second condenser elements is formed to be an annular-shape having a central opening, and the second condenser element has a rear acoustic terminal hole communicating with the central opening. | 04-07-2016 |
20160127822 | SPEAKER BOX - A speaker box is provided in the present disclosure. The speaker box includes a housing having a sound outlet, a top plate covering the housing, and a sound generator installed to the housing. A front sound chamber and a sound guide channel are formed between the housing and the top plate. The sound generator is configured for providing audible sound to the front sound chamber. The sound guide channel communicates with the front sound chamber, and is configured for guiding the audible sound to output from the sound outlet. An acoustic absorber is arranged within the sound guide channel. | 05-05-2016 |
381347000 | On front side of diaphragm | 2 |
20080247583 | Speaker, Method of Manufacture Therefore, and Speaker Attenuation System, Method and Apparatus - A speaker attenuation system includes an attenuating member comprised primarily of open cell foam or other suitable material and having a size and a shape operable to attenuate a speaker when positioned in a central beam region of the speaker. A positioning mechanism positions the attenuating member predominantly in the central beam region of the speaker by attaching the attenuating member to the speaker. | 10-09-2008 |
20090238391 | VIBRATION ABSORBING MEMBER AND AUDIO APPARATUS USING THE SAME - An audio apparatus includes a speaker having an output surface from which sound waves of the speaker radiate out; and a vibration absorbing member housing the speaker therein. The vibration absorbing member including a vibration absorbing portion attached to the output surface of the speaker, and a fastening portion connecting and surrounding the vibration absorbing portion and sleeves on the speaker configured for attaching the vibration absorbing member to the speaker. The vibration absorbing portion defining a through hole for allowing the sound waves from the speaker to radiate out. | 09-24-2009 |