Acoustic Damping Or Attenuating Resonator Patents (Class 381/353)
  • Patent number: 11082778
    Abstract: In one aspect, a low frequency driver is provided having a diaphragm operable to produce sound, a front volume, and an outlet that receives sound from the front volume and directs sound out from the low frequency driver. The low frequency driver further includes a low-pass filter chamber in communication with the front volume.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: August 3, 2021
    Assignee: Knowles Electronics, LLC
    Inventor: Erik Wiederholtz
  • Patent number: 11051098
    Abstract: An electronic apparatus may include a loudspeaker that includes an enclosure; a first driver disposed in the enclosure and configured to output a sound based on an input audio signal; a unit accommodator having a hole in which the first driver is disposed, and extending toward an inside of the enclosure; a space forming portion extended from an outer edge of the unit accommodator, surrounding a back of the first driver to form a space with the unit accommodator, and spaced apart from an inner edge of the unit accommodator; a slot forming portion extending from the space forming portion, and having an inner surface spaced apart from an outer surface of the unit accommodator to form a first sound output passage; and a sound absorber disposed at at least one of the outer surface of the unit accommodator and the inner surface of the slot forming portion.
    Type: Grant
    Filed: December 31, 2019
    Date of Patent: June 29, 2021
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sungjoo Kim, Jongbae Kim, Sungha Son
  • Patent number: 10958998
    Abstract: A sound output device includes: a speaker unit that has a sound emitting portion; an attaching member by which the speaker unit is attached to an object; a separating member that is provided between the speaker unit and the attaching member to separate the speaker unit from the attaching member; and a sealing member that is provided between the speaker unit and the attaching member to reduce a sound that is emitted from a side of the speaker unit opposite to the sound emitting portion and is transmitted to a sound emitting portion side. The attaching member has a first portion on a side of the sound emitting portion of the speaker unit, and the first portion of the attaching member has an opening that corresponds to the sound emitting portion.
    Type: Grant
    Filed: August 7, 2020
    Date of Patent: March 23, 2021
    Assignee: YAMAHA CORPORATION
    Inventors: Kunito Takahashi, Akiyoshi Sato, Tsuyoshi Okami
  • Patent number: 10681456
    Abstract: The present invention refers to a loudspeaker, in especially to a bass reflex tube for a loudspeaker. Commonly, said loudspeakers include at least one woofer driver, by which an electric audio signal is transduced via a voice coil and a diaphragm into soundwaves of medium to low frequency. A bass reflex tube for a loudspeaker should be provided, which enables said loudspeaker to produce an acoustic signal according to an electrical signal, wherein the acoustic signal shows optimized an improved quality characteristics, in especially with regards to quality and accuracy of the conversion of electrical signal into the acoustic signal. The problem mentioned above is solved by a bass reflex tube for a loudspeaker, wherein said bass reflex tube is at least partially made of a ceramic material. Further, the bass reflex tube comprises a tubular portion, which is extending in an axial direction of a longitudinal axis of the bass reflex tube.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: June 9, 2020
    Assignee: Burmester Audiosysteme GmbH
    Inventors: Stefan Größler, Robert Horbach, Martin Lorenz, Pascal-Philippe Bings, Thomas Wenzel
  • Patent number: 10477302
    Abstract: A passive sound absorber includes a cavity opening to the outside via an input direction to form a Helmholtz resonator for a first frequency. The absorber further includes at least one moving element, or wafer, suspended or held by suspensions in a position obstructing the neck in a non-sealed manner. The relative stiffness of the suspensions and the wafer is determined so that the assembly resonates in a vibration in a “piston” movement at a second frequency different from the first frequency, achieving absorption for this second frequency or frequency range. A hybrid version includes a coil that is controlled to adjust the acoustic impedance of the absorber. An acoustic wall includes a plurality of such absorbers produced by a repetitive structure opening through perforations, each receiving such a wafer, and a method of designing and manufacturing such an absorber or wall is also provided.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: November 12, 2019
    Assignees: UNIVERSITE PARIS-SUD, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, UNIVERSITE DU MANS
    Inventors: Emile Martincic, Alexandre Houdouin, Stéphane Durand, Nourdin Yaakoubi, Elie Lefeuvre, Yves Auregan
  • Patent number: 10330553
    Abstract: The disclosed technology includes a transducer assembly having a first transducer element. The transducer assembly includes a first filter element adjacent to least of portion of the first transducer element such that a first cavity is defined between the first filter element and the first transducer element. The first filter element includes a plurality of machined passageways in communication with the first cavity. The transducer assembly also includes an inlet passage having a first end in communication with a first external portion of the transducer assembly and a second end in communication with the plurality of machined passageways.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: June 25, 2019
    Assignee: Kulite Semiconductor Products, Inc.
    Inventors: Robert Gardner, Louis DeRosa
  • Patent number: 10327085
    Abstract: A loudspeaker diaphragm includes a base layer and a coating layer. The base layer contains natural fibers. The coating layer is formed on at least one of surfaces of the base layer. The coating layer is composed of chitin nanofibers each having a higher elastic modulus than that of the base layer.
    Type: Grant
    Filed: January 15, 2018
    Date of Patent: June 18, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Hidetoshi Hiraoka
  • Patent number: 9161120
    Abstract: The invention relates to a loudspeaker which includes one or more drivers, a front panel and a further panel extending rearwardly therefrom. The rearwardly extending panel is typically offset towards one side of the front panel and includes an outer edge with at least portion which is curved. The provision of the arrangement of the said panels provides significant improvement in terms of the sound quality which can be achieved from the loudspeaker.
    Type: Grant
    Filed: February 11, 2011
    Date of Patent: October 13, 2015
    Assignee: SOUND-WING TECHNOLOGIES LTD
    Inventor: Stephen A. Beardsley
  • Patent number: 9154865
    Abstract: One embodiment of the invention discloses an acoustic device having a housing and a speaker unit accommodated in the housing. The speaker unit forms a front volume and a back volume together with the housing. The housing includes an extra volume communicating with the back volume and a sound channel communicated with the front volume. The extra volume is isolated from the sound channel. The invention provides an acoustic device with enlarged back volume for improving low frequency sound quality.
    Type: Grant
    Filed: August 26, 2013
    Date of Patent: October 6, 2015
    Assignees: AAC Microtech (changzhou) Co., Ltd., AAC Acoustic Technologies (shenzhen) Co., Ltd.
    Inventors: Yu-Bin Zha, Xiong Zhang
  • Patent number: 9020177
    Abstract: Apparatus, systems and methods for providing a speaker with a backvolume that can be used in a portable electronic device are disclosed. The backvolume can be arranged to fit into a small, irregularly shaped space, thereby efficiently utilizing available space. In one embodiment, the backvolume can have a reduced wall thickness.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: April 28, 2015
    Assignee: Apple Inc.
    Inventor: Sawyer I. Cohen
  • Patent number: 9020178
    Abstract: The present invention provides a novel drive unit mounting arrangement, in which a drive unit having a chassis is mounted to a cabinet from at least two sides. The arrangement comprises a member for securing the drive unit to the cabinet from mounting points of the chassis. The arrangement further comprises a suspension member between the mounting points of the chassis and the cabinet such as to suspend the drive unit chassis elastically to the cabinet for allowing suspension in both forward and rearward directions.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: April 28, 2015
    Assignee: Genelec Oy
    Inventors: Ilpo Martikainen, Markku Kulomäki, Aki Mäkivirta, Jussi Väisänen, Noa Eskelinen, Jari Mäkinen, Pekka Nissinen
  • Patent number: 9008335
    Abstract: A directional sound generating apparatus and a directional speaker array including the same are disclosed. The directional sound generating apparatus includes a sound transducer, a reflection plate which is located behind the sound transducer, and a blocking plate which is provided between a front portion and a back portion of the sound transducer.
    Type: Grant
    Filed: September 7, 2009
    Date of Patent: April 14, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jung-woo Choi, Young-tae Kim, Jung-ho Kim, Sang-chul Ko
  • Publication number: 20150078605
    Abstract: The present invention provides an improved speaker structure, which includes a speaker body, a resonance body and at least one sound guiding portion. The resonance body includes a resonance film and a resonance film frame. The sound guiding portion includes a first sound guiding member, a second sound guiding member and a back frame unit. The speaker structure forms a sealed sound chamber by combining the speaker body, the resonance body and the at least one sound guiding portion. When the speaker body generates a front sound wave and a guiding sound wave, the front sound wave is transmitted within the sound chamber to the resonance film to enhance low frequency sound effect, and the guiding sound wave is transmitted within the resonance cavity and forms a back sound wave, thus reducing noise in the sound region and enabling better extension of the sound wave towards low frequency range.
    Type: Application
    Filed: February 25, 2014
    Publication date: March 19, 2015
    Applicants: FirstChair Acoustics Co., Ltd.
    Inventor: Ching-Wen Yang
  • Publication number: 20150016652
    Abstract: A sealed speaker system includes an enclosure and a transducer diaphragm mounted within the enclosure, where an increase in air pressure within the enclosure results in an outward movement of the diaphragm toward an exterior of the enclosure, and a decrease in air pressure within the enclosure results in an inward movement of the diaphragm toward an interior of the enclosure. A pressure vent is provided in the enclosure and allows a gradual transfer of air between the enclosure interior and the enclosure exterior to substantially maintain a pressure equilibrium between the enclosure interior and the enclosure exterior.
    Type: Application
    Filed: May 1, 2014
    Publication date: January 15, 2015
    Applicant: Harman International Industries, Inc.
    Inventor: Jerry Moro
  • Publication number: 20150010190
    Abstract: A sound generating apparatus is provided for expanding a mid-range of a slit-firing type speaker system. The sound generating apparatus includes a vibrator, a body part which encloses the vibrator, a path through which the generated sound is transmitted, and a slit formed in a length direction of the body part connected to an end portion of the path and configured to emit the sound.
    Type: Application
    Filed: June 20, 2014
    Publication date: January 8, 2015
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Gyeong-tae LEE, Jong-bae KIM, Dong-kyu PARK, Jong-in JO, Seung-chan LEE, Sang-min HYUN
  • Patent number: 8903116
    Abstract: An audio emitter comprises a support member operable to support a sound emittive material and a sound emittive material carried by the support member. A protective screen has a plurality of apertures formed therein, the protective screen being spaced a predetermined distance from the sound emittive material, said predetermined distance being a function of a resonant frequency of the audio emitter.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: December 2, 2014
    Assignee: Turtle Beach Corporation
    Inventor: Elwood G. Norris
  • Patent number: 8897477
    Abstract: The dual resonator chamber with variable volume includes first and second housings. The second housing is slidably mounted within the first housing such that a second inner neck portion of the second housing is slidably mounted about the first inner neck portion of the first housing and forms a fluid-tight seal therewith. A sliding wall is slidably mounted within the second housing, dividing the interior thereof into upper and lower resonator chambers. At least one first actuator selectively adjusts the height of the sliding wall with respect to the second lower end of the second housing to selectively adjust volumes of the upper and lower resonator chambers. At least one second actuator selectively adjusts the height of the second housing with respect to the first housing to selectively adjust the neck length of the lower resonator chamber.
    Type: Grant
    Filed: May 20, 2013
    Date of Patent: November 25, 2014
    Assignee: King Fahd University of Petroleum and Minerals
    Inventor: Samir Mekid
  • Publication number: 20140294220
    Abstract: A loudspeaker unit comprising a loudspeaker housing and a first and a second loudspeaker, wherein the two loudspeakers are both placed in a flat front wall of the loudspeaker housing, the rear side of the first loudspeaker adjoins a first space in the loudspeaker box and the rear side of the second loudspeaker adjoins a second space in the loudspeaker box, and the first and the second space in the loudspeaker box are separated by a wedge-shaped body, the base of which is connected to a wall placed opposite the front wall and the intersection between the sloping surfaces of which is located in the vicinity of the front wall, wherein the wedge has a length in the direction transversely of the plane of the front wall that is at least twice the distance between the sloping surfaces at the position of the base of the wedge-shaped body.
    Type: Application
    Filed: September 3, 2012
    Publication date: October 2, 2014
    Applicant: KALKMANN SOUND SYSTEMS B.V.
    Inventor: Hubert Kalkman
  • Patent number: 8848960
    Abstract: A cone speaker that outputs audio by transmitting to a truncated cone, the movements of a voice coil driven when an audio current is transmitted through a voice coil placed inside a magnetic circuit formed in a space that surrounds a pole piece. Inside a space between the back surface of a center cap attached to a central portion of the cone and the apical surface of the pole piece that faces the center cap, a first filling material composed of a flexible porous body with a low porosity fills the periphery of the space and a second filling material composed of a flexible porous body with a higher porosity than the first filling material fills the central portion thereof.
    Type: Grant
    Filed: April 23, 2009
    Date of Patent: September 30, 2014
    Assignee: Genus Audio Corp.
    Inventor: Eiji Yamazaki
  • Patent number: 8848934
    Abstract: Method, user terminal and computer program product for controlling audio signals at the user device during a communication session between the user device and a remote node, in which a primary audio signal is received at audio input means of the user device for transmission to the remote node in the communication session. It is determined whether the user device is operating in (i) a first mode in which secondary audio signals output from the user device are likely to disturb the primary audio signal received at the audio input means, or (ii) a second mode in which secondary audio signals output from the user device are not likely to disturb the primary audio signal received at the audio input means.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: September 30, 2014
    Assignee: Skype
    Inventor: Nils Ohlmeier
  • Patent number: 8848961
    Abstract: One embodiment of the invention discloses a speaker box having a housing and a speaker accommodated in the housing. The speaker includes a sound radiation surface for generating sound. The housing includes a first and second output ports disposed at one side of the housing for transmitting the sound to outside of the speaker box. The housing includes a plurality of ribs disposed therein and forming a bending channel. The first and second output ports are disposed at two ends of the bending channel. The bending channel is divided into a front channel and a back channel by the speaker. The speaker box is capable of obtaining a better low frequency sound reproduction quality.
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: September 30, 2014
    Assignees: AAC Acoustic Technologies (Shenzhen) Co., Ltd., AAC Microtech (Changzhou) Co., Ltd.
    Inventors: Xing-Zhi Huang, Xu-Dong Yan
  • Publication number: 20140226845
    Abstract: The inventive subject matter provides a reflex tube or port that includes a circuit board and a speaker enclosure that incorporates such a reflex tube. The circuit board is mounted about the reflex tube and can be configured so as to form a resonance chamber with an interior wall of a speaker enclosure to form a resonance chamber.
    Type: Application
    Filed: February 12, 2014
    Publication date: August 14, 2014
    Applicant: Pellisari, LLC
    Inventor: Francesco Pellisari
  • Patent number: 8804991
    Abstract: A loudspeaker assembly is disclosed for use in a loudspeaker system having infinite baffle topology. The assembly comprises a driver including a cone and a basket and at least one Helmholtz resonator including a chamber and a vent duct communicating with the chamber and adapted to pass through the infinite baffle. The chamber is dimensioned to provide a tuned frequency well above an operating band associated with the driver. The cross sectional area and length of the vent duct may be set to provide control over duct air noise and low frequency extension. A method of tuning a loudspeaker assembly for use in a loudspeaker system having infinite baffle topology is also disclosed.
    Type: Grant
    Filed: October 22, 2010
    Date of Patent: August 12, 2014
    Assignee: Blueprint Acoustics Pty Ltd
    Inventor: Zeljko Velican
  • Patent number: 8781145
    Abstract: In a low frequency transducer system a multi-compression chamber, an inverse horn structure is employed in combination with a resonance-distortion filter chamber. The filter chamber effectively expands the effective enclosure volume at low frequencies and connected to one of the compression chambers filter parasitic resonances and distortion and allowing the system to more efficiently reproduce low frequencies while being able to use smaller diameter transducers and maintaining good system sensitivity. Compression chambers are organized for constant or continuous compression on a section-by-section basis throughout the inverse horn system.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: July 15, 2014
    Inventor: Philip R. Clements
  • Patent number: 8755553
    Abstract: An apparatus comprises: a transducer configured to generate sound; and a housing defining a first cavity and a second cavity, the first cavity and the second cavity being connected to the transducer; wherein the first cavity comprises a first sound outlet at a first surface of the housing; and the second cavity comprises a second sound outlet at the first surface of the housing and a third sound outlet at a second surface of the housing wherein the first and second cavities and the first and second sound outlets are configured to limit a sound pressure level of the generated sound at the first and second outlets at one or more frequencies.
    Type: Grant
    Filed: December 24, 2009
    Date of Patent: June 17, 2014
    Assignee: Nokia Corporation
    Inventor: Thomas Benedict Slotte
  • Patent number: 8750549
    Abstract: A system providing a resonator for a transducer of an electronic device is provided. The system comprises a housing defining: a first enclosure having a first opening to house a back end of the transducer and a second opening; a port connected to the first enclosure through the second opening of the first enclosure, the port having a first end, a second end, an interior channel and a second opening in the second end; a second enclosure to cover a front portion of the speaker; and at least one aperture defined in the second enclosure to allow air outside of the electronic device to be in communication with the front of the transducer. When the transducer is mounted into the first enclosure, a first volume between the transducer and the first enclosure is formed which is in communication with air surrounding the second end of the port.
    Type: Grant
    Filed: October 17, 2012
    Date of Patent: June 10, 2014
    Assignee: Blackberry Limited
    Inventor: Christian Lorenz
  • Patent number: 8744108
    Abstract: A duct design and methods for designing ducts are described herein. The duct has a profile described by an equation that balances momentum of the fluid flowing through the duct with an adverse pressure gradient. The duct profile is configured to: (i) maintain the fluid's momentum to be greater than the adverse pressure gradient present at any location within the duct, such that no boundary layer separation occurs; and (ii) achieve a fluid exit momentum of approximately zero.
    Type: Grant
    Filed: July 12, 2012
    Date of Patent: June 3, 2014
    Assignee: Strata Audio LLC
    Inventor: Mark Trainer
  • Patent number: 8737657
    Abstract: A suspension for a hearing device having a receiver includes a first part, a second part, and a vibration isolator positioned between the first and the second parts, and mechanically coupled to the first and second parts, wherein the first part is configured to at least partly enclose the receiver, wherein the second part is configured to at least partly enclose a sound outlet of the hearing device, wherein the vibration isolator comprises an acoustic passage part and a damping part enclosing the acoustic passage, wherein the acoustic passage part provides an acoustic passage between the first and second parts, wherein the damping part of the vibration isolator is asymmetrical along a longitudinal, a transverse axis, or both the longitudinal axis and the transverse axis, of the vibration isolator, and wherein the vibration isolator is freely suspended between the first and second parts.
    Type: Grant
    Filed: November 11, 2010
    Date of Patent: May 27, 2014
    Assignee: GN Resound A/S
    Inventors: Morten Birkmose Søndergaard, Jan Johansen
  • Publication number: 20140126761
    Abstract: A speaker apparatus for producing sound comprising of a housing, a plurality of covers, a speaker driver, a radiator, a resonator and a resonator stand which in combination provide an enhanced low frequency sound output.
    Type: Application
    Filed: November 7, 2012
    Publication date: May 8, 2014
    Inventor: LONG NGOC PHAM
  • Publication number: 20140072162
    Abstract: One embodiment of the invention discloses a speaker box having a housing and a speaker accommodated in the housing. The speaker includes a sound radiation surface for generating sound. The housing includes a first and second output ports disposed at one side of the housing for transmitting the sound to outside of the speaker box. The housing includes a plurality of ribs disposed therein and forming a bending channel. The first and second output ports are disposed at two ends of the bending channel. The bending channel is divided into a front channel and a back channel by the speaker. The speaker box is capable of obtaining a better low frequency sound reproduction quality.
    Type: Application
    Filed: September 9, 2013
    Publication date: March 13, 2014
    Applicants: AAC MICROTECH (CHANGZHOU) CO., LTD., AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) CO., LTD.
    Inventors: Xing-Zhi Huang, Xu-Dong Yan
  • Patent number: 8630435
    Abstract: Apparatus for compensating for pressure changes in an acoustic transducer system includes a skeleton member having a predetermined configuration and adsorbent material having a regular structure and being supported on the skeleton member. The apparatus may include a plurality of members, each of the plurality of members having a plurality of hollows formed therein, at least one main surface of each of the plurality of members substantially facing and spaced apart from a main surface of an adjacent one of the plurality of members, and the adsorbent material may be provided within each of the plurality of hollows.
    Type: Grant
    Filed: March 26, 2009
    Date of Patent: January 14, 2014
    Assignee: Nokia Corporation
    Inventors: Tim John Mellow, Asta Maria Karkkainen, Andrew John Flewitt
  • Patent number: 8605929
    Abstract: A film-type audio output apparatus includes an audio output device, at least one speaker unit, and at least one film. The at least one speaker unit is positioned at any side of the audio output device. The speaker unit can be an embedded speaker unit. The at least one film can be positioned at any or more places of an inner side and an outer side of the audio output device. When the speaker unit of the audio output device releases sound, the film positioned on the audio output device can get vibration of the sound so that the inside of the audio output device can generate resonance. Thus, the audio output apparatus can generate softer undertone and wider diapason.
    Type: Grant
    Filed: October 26, 2011
    Date of Patent: December 10, 2013
    Assignee: Global Target Enterprise Inc.
    Inventor: Liang-Tan Tsai
  • Patent number: 8588864
    Abstract: An electronic device as provided here includes a primary housing, an acoustic transducer, a lower layer of acoustic mesh material, and an upper layer of acoustic mesh material. An interior volume is defined within the primary housing. The primary housing includes an interior mounting surface, an exterior mounting surface, and an acoustic port. The transducer is located within the interior volume, and the lower layer of mesh material is coupled between the interior mounting surface and the transducer to cover a lower opening of the acoustic port. The upper layer of mesh material covers an upper opening of the acoustic port. Each layer of mesh material provides an amount of acoustic transparency and an amount of visual obscurity such that the transducer is effectively hidden from view without adversely impacting the audio performance characteristics of the transducer.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: November 19, 2013
    Assignee: Motorola Mobility LLC
    Inventors: Christopher P. Carlson, Jason E. Jordan, Vivek M. Patel
  • Patent number: 8582794
    Abstract: Systems, methods, and devices for improving speaker performance with an acoustic damped port are disclosed. In accordance with various embodiments of the present invention, a damping material is placed around a vented frame of a speaker driver, and substantially covers or fills the vents of the frame. In some embodiments, the damping material results in improved impedance matching with acoustic delay, without required dimensional tuning (as with conventional ports). In some embodiments, it also reduces the air velocity gradients minimizing higher order frequency distortion components. In some embodiments, the damping material also acts as an absorber of energy by coupling to the sound wave. In some embodiments, low-frequency performance is improved in a small-scale design.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: November 12, 2013
    Assignee: Polycom, Inc.
    Inventor: Wayne Stanley Foletta
  • Patent number: 8577070
    Abstract: A speaker with vibration absorbing function is disclosed in the present invention. The speaker is disposed on a boss of a casing. The speaker includes a sound box, and a supporting arm disposed on a lateral surface of the sound box. The supporting arm includes a bending portion. An end of the bending portion is connected to the sound box. The supporting arm further includes a hooking portion disposed on the other end of the bending portion for hooking the boss of the casing. Vibration generated from the sound box can decay by the bending portion, and is not transmitted to the boss via the hooking portion.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: November 5, 2013
    Assignee: Wistron Corporation
    Inventor: Ching-Jeng Yu
  • Publication number: 20130266170
    Abstract: Provided is a technique for improving frequency characteristics by an acoustics-related method so that a sound is heard with natural frequency characteristics when a sound-isolating earphone is fitted in a human ear. A sound-isolating earphone is provided with two or more electroacoustic transducers, wherein independently generated sound waves are passed through isolated sound leading pipes and are mixed just before an entrance of an external auditory canal, and a sound wave of which is twice the difference between path lengths of the two sound leading pipes is attenuated. This serves to provide an easy-to-hear improved sound quality by suppressing the sound wave at around 6 kHz that is transmitted with characteristically high intensity in a sound-isolating earphone.
    Type: Application
    Filed: May 9, 2012
    Publication date: October 10, 2013
    Applicant: OCHARAKU CO. LTD.
    Inventor: Makoto Yamagishi
  • Publication number: 20130259268
    Abstract: Disclosed is a speaker system. The speaker system includes a multimedia unit including a plurality of speaker units, a resonance medium for supporting the multimedia unit, a number of low frequency vibrators assembled with the multimedia unit and located between the multimedia unit and the resonance medium, a driving unit for providing high frequency audio signals to the speaker units and low frequency audio signals to the low frequency vibrators. A resonance member is formed by the low frequency vibrators and the resonance medium for producing low frequency sound.
    Type: Application
    Filed: November 15, 2012
    Publication date: October 3, 2013
    Applicants: AAC ACOUSTIC TECHNOLOGIES (CHANGZHOU) CO.,LTD., AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) CO.,LTD.
    Inventors: Rong-guan Zhou, Hong-xing Wang, Jing He, Bin Xu
  • Patent number: 8532323
    Abstract: An acoustic system includes a receiver or microphone, a tube, a barrier, and an equalization device. The receiver is capable of outputting an audio signal. The tube is in connection with the receiver and the audio signal travels along a length of the tube. The barrier is fitted along the tube and the barrier prevents moisture from passing along the tube toward the receiver. The barrier causes an amount of damping to the audio signal. The equalization device is in connection with the receiver and the equalization device counteracts the damping by the barrier. The barrier is configured to have a submersion rating greater than or equal to 7 IP.
    Type: Grant
    Filed: January 19, 2011
    Date of Patent: September 10, 2013
    Assignee: Knowles Electronics, LLC
    Inventors: Timothy K. Wickstrom, William J. Ballad, Mei-Yu Lin, Ying-Tzu Chan, Jen Nan Feng
  • Publication number: 20130195305
    Abstract: A loudspeaker comprising a housing and a membrane mounted in said housing, which membrane can be set vibrating so as to produce sound, wherein the loudspeaker has at least one sound channel which extends between the membrane and the outer side of the housing, and wherein one or more local sound barriers are provided in the sound channel, which sound barriers locally block at least 15% of the cross-sectional area of the sound channel, such that amplification of the sound pressure occurs in the audible frequency range due to resonance.
    Type: Application
    Filed: May 27, 2011
    Publication date: August 1, 2013
    Applicant: ALCONS AUDIO B.V.
    Inventor: Philip Derek Eduard De Haan
  • Patent number: 8494203
    Abstract: Systems, methods, and devices for providing high quality speaker performance in a small-scale design are disclosed. In accordance with various embodiments of the present invention, a small-scale speaker assembly is provided which is capable of delivering high-fidelity wideband audio. The speaker assembly includes a speaker driver and a number of electronic components within an enclosure. In some embodiments at least one microphone is included in the assembly. In some embodiments the speaker assembly is well suited for audio conferencing. In some embodiments low-frequency performance is improved in a small-scale design.
    Type: Grant
    Filed: April 30, 2007
    Date of Patent: July 23, 2013
    Assignee: Polycom, Inc.
    Inventors: Jeffrey Rodman, Wayne Stanley Foletta
  • Publication number: 20130177190
    Abstract: A duct design and methods for designing ducts are described herein. The duct has a profile described by an equation that balances momentum of the fluid flowing through the duct with an adverse pressure gradient. The duct profile is configured to: (i) maintain the fluid's momentum to be greater than the adverse pressure gradient present at any location within the duct, such that no boundary layer separation occurs; and (ii) achieve a fluid exit momentum of approximately zero.
    Type: Application
    Filed: July 12, 2012
    Publication date: July 11, 2013
    Applicant: STRATA AUDIO LLC
    Inventor: Mark Trainer
  • Patent number: 8477954
    Abstract: Method, user terminal and computer program product for controlling audio signals at the user device during a communication session between the user device and a remote node, in which a primary audio signal is received at audio input means of the user device for transmission to the remote node in the communication session. It is determined whether the user device is operating in (i) a first mode in which secondary audio signals output from the user device are likely to disturb the primary audio signal received at the audio input means, or (ii) a second mode in which secondary audio signals output from the user device are not likely to disturb the primary audio signal received at the audio input means.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: July 2, 2013
    Assignee: Microsoft Corporation
    Inventor: Nils Ohlmeier
  • Publication number: 20130156245
    Abstract: An electronic audio device including an enclosure having an acoustic output opening and a speaker positioned within the enclosure. The speaker and the acoustic output opening are acoustically coupled by an acoustic output pathway. The acoustic output pathway includes a damping chamber to dampen a resonance frequency of the acoustic output pathway. The speaker is between the damping chamber and the acoustic output opening.
    Type: Application
    Filed: December 15, 2011
    Publication date: June 20, 2013
    Applicant: Apple Inc.
    Inventors: Gordon R. Dix, Justin Derry Crosby, Martin E. Johnson, Michael Kai Morishita
  • Patent number: 8459403
    Abstract: A front resonator for a speaker of a wireless device, comprising: an enclosure mounted over the speaker and forming with an upper surface of the speaker a front volume for the front resonator; and, a horizontal or approximately horizontal tube formed or mounted on a surface of the enclosure, the tube coupled to the front volume, and the tube having at least one end to emit sound generated by the speaker and passing through the front volume and tube from the wireless device.
    Type: Grant
    Filed: January 12, 2012
    Date of Patent: June 11, 2013
    Assignee: Research In Motion Limited
    Inventors: Gunther Burghardt, Markus Thrien
  • Patent number: 8437496
    Abstract: A membrane 103 for an acoustic device 100 is provided, the membrane 103, wherein the membrane 103 comprises a central portion 212, an annular portion 105, and a corrugation 107, wherein the annular portion 105 is arranged around the central portion 212, wherein the annular portion 105 is adapted to be fixed to a coil 106, and wherein the corrugation 107 is arranged between the central portion 212 and the annular portion 105. Thus, the corrugation 107 may form an inner corrugation compared to an outer corrugation 104 which would be arranged farther away from the central portion 212 than the annular portion 105.
    Type: Grant
    Filed: June 20, 2008
    Date of Patent: May 7, 2013
    Assignee: Knowles Electronics Asia PTE. Ltd.
    Inventor: Ewald Frasl
  • Publication number: 20130094688
    Abstract: A system providing a resonator for a transducer of an electronic device is provided. The system comprises a housing defining: a first enclosure having a first opening to house a back end of the transducer and a second opening; a port connected to the first enclosure through the second opening of the first enclosure, the port having a first end, a second end, an interior channel and a second opening in the second end; a second enclosure to cover a front portion of the speaker; and at least one aperture defined in the second enclosure to allow air outside of the electronic device to be in communication with the front of the transducer. When the transducer is mounted into the first enclosure, a first volume between the transducer and the first enclosure is formed which is in communication with air surrounding the second end of the port.
    Type: Application
    Filed: October 17, 2012
    Publication date: April 18, 2013
    Applicant: RESEARCH IN MOTION LIMITED
    Inventor: Research In Motion Limited
  • Patent number: 8418804
    Abstract: Multiple Helmholtz resonators are combined serially and dynamically to mitigate and/or overcome acoustic noise filtering problems. One Helmholtz resonator is attached to a duct having an acoustic flow path channel containing undesired acoustic signals (noise) and is considered to be an immovable Helmholtz resonator with respect to that flow channel, while at least one movable Helmholtz resonator is movably and acoustically coupled to the immovable Helmholtz resonator. The immovable and movable Helmholtz resonators are acoustically coupled together to adjustably filter two resonant frequencies in the flow path channel with a feedback control system that adjusts the position of the movable Helmholtz resonator in response to the differences in pre-filtered noise versus filtered noise.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: April 16, 2013
    Assignee: King Fahd University of Petroleum and Minerals
    Inventor: Muhammad A. Hawwa
  • Patent number: 8416978
    Abstract: [Problem to be Solved] To provide a high-sensitive compact vibration pickup microphone, suitably used as a talking microphone in high ambient noise environments or as a speech recognition input microphone, with high microphone sensitivity, resistance to sliding noise, and insensitivity to external noise and vibration.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: April 9, 2013
    Assignee: Temco Japan Co., Ltd.
    Inventor: Mikio Fukuda
  • Publication number: 20130070950
    Abstract: An exemplary earphone module includes a faceplate, a bottom cover connected to the top cover, and a microphone received between the faceplate and the bottom cover. The faceplate defines a sound hole therein. The microphone defines a Helmholtz resonance chamber therein. A washer is placed between the faceplate and the microphone. The washer has a sound chamber communicating the sound hole with the Helmholtz resonance chamber. The Helmholtz resonance chamber has a volume V, the sound hole has a diameter d and a length l, and the sound chamber has a diameter D. The diameter D of the sound chamber meets the equation D=d or the formula D ? 4 ? V ? ? ( l + 0.8 ? d ) .
    Type: Application
    Filed: November 13, 2012
    Publication date: March 21, 2013
    Inventor: HWANG-MIAW CHEN
  • Patent number: 8401217
    Abstract: The present invention is an extremely low frequency (ELF) microphone and acoustic measurement system capable of infrasound detection in a portable and easily deployable form factor. In one embodiment of the invention, an extremely low frequency electret microphone comprises a membrane, a backplate, and a backchamber. The backchamber is sealed to allow substantially no air exchange between the backchamber and outside the microphone. Compliance of the membrane may be less than ambient air compliance. The backplate may define a plurality of holes and a slot may be defined between an outer diameter of the backplate and an inner wall of the microphone. The locations and sizes of the holes, the size of the slot, and the volume of the backchamber may be selected such that membrane motion is substantially critically damped.
    Type: Grant
    Filed: July 20, 2007
    Date of Patent: March 19, 2013
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Qamar A. Shams, Allan J. Zuckerwar