Acoustic Resistance Patents (Class 381/346)
  • Patent number: 11019859
    Abstract: An acoustic face mask reduces the distortion and muffling of speech sounds by a face mask wall. The distortion and muffling of speech sounds by a face mask wall may be reduced by reducing the acoustic coupling of the vocal tract and/or nasal cavity to the face mask chamber, which causes a reduction in the intelligibility of the speech. The acoustic coupling of the vocal tract and/or nasal cavity to the face mask chamber may be reduced, for example, by reducing the reflected sound energy caused by the face mask wall. For example, one or more sound absorbing members or acoustically transparent members reduce the reflected sound energy caused by the face mask wall.
    Type: Grant
    Filed: August 16, 2020
    Date of Patent: June 1, 2021
    Assignee: Acoustic Mask LLC
    Inventor: Martin Rothenberg
  • Patent number: 10440466
    Abstract: A speaker module including a speaker box, a diaphragm and a plurality of porous grains is provided. The diaphragm is disposed on the speaker box and adapted to receive a signal to vibrate. The porous grains are disposed in the speaker box and adapted to absorb energy of air in the speaker box.
    Type: Grant
    Filed: May 21, 2018
    Date of Patent: October 8, 2019
    Assignee: Acer Incorporated
    Inventors: Jia-Ren Chang, Wan-Chi Lin
  • Patent number: 10334355
    Abstract: A loudspeaker array has a cabinet in which is formed a continuously open circumferential horn for controlling sound produced by a number of transducers which are positioned in the cabinet, at a throat of the horn. The continuously open circumferential horn may 1) improve the power efficiency of the transducers without unwanted aliasing effects in audible frequency ranges and 2) provide vertical control for sound emitted by the transducers by flaring.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: June 25, 2019
    Assignee: Apple Inc.
    Inventors: Martin E. Johnson, Christopher Wilk, John H. Sheerin, Suzanne Hardy, Tom-Davy William Jendrik Saux
  • Patent number: 10219070
    Abstract: Invention relates to the field of acoustic systems used to convert electrical signal into sound, and the design of the housing where the electroacoustic loudspeaker is mounted and may be used in household and industrial applications as an acoustic system. The acoustic transducer has a housing, made from coconut endocarp, containing at least one opening for mounting a loudspeaker, and can have additional openings for wires and/or connectors to the signal source, sound-absorbing or dampening materials, mounting elements, for example, hooks for mounting with use of a flexible cord or any other similar fastening elements, connectors, phase inverter, electronics unit, protective decorative mesh or cloth. The proposed acoustic system provides improved sound quality by reducing the level of parasitic acoustic resonances, excited by the loudspeaker in the housing during sound generation by the loudspeaker's membrane.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: February 26, 2019
    Inventor: Maksim Viktorovich Chyzhov
  • Patent number: 9860624
    Abstract: An earpiece includes a body having an acoustic driver and an output aperture. A sealing structure extends from a region adjacent the output aperture to hold the output aperture adjacent to the entrance of a user's ear canal. An acoustic nozzle having an acoustic passage conducts sound waves from the acoustic driver to the output aperture. The acoustic passage has a proximal end adjacent the acoustic driver and a distal end adjacent the output aperture. First acoustic impedance is provided at the proximal end of the acoustic nozzle adjacent the acoustic driver. Second acoustic impedance is provided at the distal end of the acoustic nozzle adjacent the output aperture. The volume of the acoustic nozzle and the first and second acoustic impedances are selected to control resonance in the user's ear canal when the sealing structure is engaged with the entrance to the user's ear canal.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: January 2, 2018
    Assignee: Bose Corporation
    Inventors: Ryan C. Silvestri, Michael J. Monahan
  • Patent number: 9036827
    Abstract: Ultrasonic signals are used to transmit sounds from a modulated ultrasonic generator to other locations from which the sounds appear to emanate. In particular, an ultrasonic carrier is modulated with an audio signal and demodulated on passage through the atmosphere. The carrier frequencies are substantially higher than those of prior systems, e.g., at least 60 kHz, and the modulation products thus have frequencies which are well above the audible range of humans; as a result, these signals are likely harmless to individuals who are within the ultrasonic fields of the system. The signals may be steered to moving locations, and various measures are taken to minimize distortion and maximize efficiency.
    Type: Grant
    Filed: August 24, 2011
    Date of Patent: May 19, 2015
    Assignee: Massachusetts Institute of Technology
    Inventor: F. Joseph Pompei
  • Publication number: 20150092974
    Abstract: A microphone 10 that comprises a transducer 12 and a closed cell foam body 18, 20 positioned between the transducer 12 and an opening 25 fashioned for receiving ambient sound. The microphone 10 is protected from external factors without exhibiting substantial sound transmission loss while using few parts. Good voice transmission, wind buffeting mitigation, and environmental protection can be achieved with a single material.
    Type: Application
    Filed: September 27, 2013
    Publication date: April 2, 2015
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventor: Per Ove Almeflo
  • Publication number: 20150071475
    Abstract: A flat panel sound system (400) includes an acoustic backing (410) and stand-offs (412) on its back side. The stand-offs (412) are interposed between a frame (406) or housing (408) and the wall on which the sound system (400) is mounted. The sound system (400) further includes an electronic housing (414) and exciters (404) mounted on the frame (406). The electronics within the electronic housing (414) receive wireless inputs from a user interface and drive the exciters (404) to produce an audio output. The stand-offs (412) inhibit transmission of vibrations to the wall and allow acoustic waves to emanate the back side of the flat panel system.
    Type: Application
    Filed: March 14, 2014
    Publication date: March 12, 2015
    Applicant: SoundWall LLC
    Inventors: David Hose, Sven Coppom
  • Publication number: 20150072723
    Abstract: An audio system that comprises an electro-acoustic transducer mounted onto a housing that forms a resonance volume which is at least partially filled with sound absorbing material, wherein the housing is realized with a deep-drawn foil at least partially filled with grains of the sound absorbing material.
    Type: Application
    Filed: September 11, 2013
    Publication date: March 12, 2015
    Inventors: Michael Schöffmann, Helmut Wasinger, Josef Herold, Mark Hannah
  • Patent number: 8965033
    Abstract: Apparatus and methods are disclosed for acoustic optimization. An example playback device includes a first transducer to at least one of output sound waves and receive sound waves, a second transducer to at least one of output sound waves and receive sound waves, and an acoustic grille positioned in relation to the first transducer, where the acoustic grille is to reflect sound waves received at a first angle of incidence.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: February 24, 2015
    Assignee: Sonos, Inc.
    Inventor: Daniel C. Wiggins
  • Patent number: 8965025
    Abstract: 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 two 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.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: February 24, 2015
    Assignees: AAC Acoustic Technologies (Shenzhen) Co., Ltd., AAC Microtech (Changzhou) Co., Ltd.
    Inventor: Tao Shen
  • Patent number: 8953830
    Abstract: A horn loudspeaker, in particular for reproducing bass sound in public address systems, in which the horn (23) is mounted directly to the driver element (21) without any intervening compression chamber. The back side of the driver element (21) is covered by a back chamber (24) designed with walls of a semi-permeable material. The walls may be perforated or made of a “leaky” material such as cell foam with open structure, or a fibrous material. The “leaky” back chamber will prevent the build up of high pressures in the back chamber at large cone excursions. The horn loudspeaker is suitable for stacking in groups of two or more, so as to produce a sound source scalable for reproducing any frequency range heard by humans in public address systems or hi-fi systems. Due to the back chamber design, the horn loudspeaker, for high frequencies especially in conical horn shaped versions, can be stacked close together.
    Type: Grant
    Filed: August 21, 2007
    Date of Patent: February 10, 2015
    Inventor: Rune Skramstad
  • Patent number: 8942402
    Abstract: An acoustic speaker device (10) according to the present invention comprises at least two types of gas adsorption materials in a cabinet (12) thereof. A porous carbon material package member (14A), which is one of the gas adsorption materials, can adsorb or eliminate air in the cabinet (12) by a porous carbon material (41) during the operation of a speaker unit (13) so as to buffer compression or expansion of air in the cabinet (12). A sheet-like moisture adsorbing material (14B), which is the other of the gas adsorbing materials, is formed by dispersing copper ion-exchanged ZSM-5 zeolite (43) in a thermoplastic resin composition (44), and is stuck on at least a section of an inner wall of the cabinet (12). This configuration allows moisture in the cabinet (12) to be rapidly adsorbed.
    Type: Grant
    Filed: April 12, 2012
    Date of Patent: January 27, 2015
    Assignee: Panasonic Corporation
    Inventor: Akiko Yuasa
  • 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: 8842868
    Abstract: An improved structure for a passive radiation sound box comprises: a body, which is formed an inner room and a sound-guide tunnel through several clapboards, the surface of the body is disposed an outlet connecting with the tunnel; a passive radiation component, each of the two ends of a vibration film has an edge, the component is disposed between the clipboards, the edges are connected with the clipboards; and an amplifier unit, which is surrounded in the room by the clapboards and the component, a vibration film of the unit is disposed on a side surface of the room, the component is beneath the unit; wherein while the unit is vibrating and sounding, partial sound pressure in the room is through the room by way of the component, and is then released by the outlet along the tunnel.
    Type: Grant
    Filed: June 25, 2013
    Date of Patent: September 23, 2014
    Assignee: Jazz Hipster Corporation
    Inventors: Yueh-Hua Hsu Huang, Lien-Huang Yang
  • Publication number: 20140254836
    Abstract: A portable electronic device having a speaker module is provided. The speaker module includes: a speaker unit; a back chamber; a channel coupled between the speaker unit and the back chamber; and a porous material filled inside at least a portion of the front chamber, the back chamber, and/or the channel, for improving and extending bass performance and relieving a channel effect caused by the channel. Moreover, the portable electronic device is advantageously able to compensate a resonance degradation caused by the porous material.
    Type: Application
    Filed: March 6, 2013
    Publication date: September 11, 2014
    Applicant: HTC Corporation
    Inventors: Hann-Shi TONG, Chun-Min LEE, Lei CHEN, Yu-Sheng LEE, Chih-Chiang CHENG
  • Patent number: 8774437
    Abstract: A speaker box and a speaker device that can be manufactured at low cost and that provide a sound-absorbing effect. A speaker box of a speaker device includes a baffle, four intermediate plates, and a rear plate. The baffle plate has a speaker mount hole at the center. Each intermediate plate has a hole. The intermediate plates are stacked such that they are alternately reversed or rotated so that the holes in the adjacent intermediate plates communicate with each other while the holes are shifted from with each other. A hollow space with a sound-absorbing effect is formed by the holes in the speaker box.
    Type: Grant
    Filed: November 9, 2007
    Date of Patent: July 8, 2014
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takeshi Nakamura, Takao Mouri
  • Patent number: 8724841
    Abstract: A portable electronic device having an outer case having a substantially planar face in which a microphone associated acoustic port is formed. The device also has a micro-electro-mechanical system (MEMS) microphone positioned within the outer case, the MEMS microphone having a diaphragm facing the microphone associated acoustic port. An acoustic mesh is positioned between the front face of the outer case and the diaphragm, the acoustic mesh having a non-linear acoustic resistance so as to minimize an effect of an incoming air burst on the diaphragm. Other embodiments are also described and claimed.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: May 13, 2014
    Assignee: Apple Inc.
    Inventors: Andrew P. Bright, Christopher R. Wilk, Jae Han Lee, Ruchir M. Dave, Scott P. Porter, Sawyer Isaac Cohen
  • Patent number: 8718309
    Abstract: In the invention a speaker apparatus acoustically combines the earpiece and hands free functions. Thus a speaker has acoustically separated functions for acting as the earpiece and as the hands free. The speaker apparatus has a back cavity having an outlet so that the damped sound of the outlet operates as the earpiece. The front of the speaker apparatus operates as the louder hands free.
    Type: Grant
    Filed: June 29, 2006
    Date of Patent: May 6, 2014
    Assignee: Nokia Corporation
    Inventors: Anders Weskström, Benedict Slotte
  • Publication number: 20140093113
    Abstract: 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.
    Type: Application
    Filed: September 28, 2012
    Publication date: April 3, 2014
    Applicant: Apple Inc.
    Inventors: Gordon R. Dix, Michael K. Morishita
  • Patent number: 8687836
    Abstract: 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.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: April 1, 2014
    Assignee: Bose Corporation
    Inventor: Lifun Lin
  • Publication number: 20140072161
    Abstract: 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.
    Type: Application
    Filed: September 7, 2012
    Publication date: March 13, 2014
    Inventors: Stephen D. Boyle, Kenneth D. Gagnon, Jonathan A. Knudsen, William Tice, Kevin J. Winter
  • Publication number: 20140064540
    Abstract: 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.
    Type: Application
    Filed: August 31, 2012
    Publication date: March 6, 2014
    Applicant: Bose Corporation
    Inventor: Lifun Lin
  • Publication number: 20140037119
    Abstract: An acoustic speaker device (10) according to the present invention comprises at least two types of gas adsorption materials in a cabinet (12) thereof. A porous carbon material package member (14A), which is one of the gas adsorption materials, can adsorb or eliminate air in the cabinet (12) by a porous carbon material (41) during the operation of a speaker unit (13) so as to buffer compression or expansion of air in the cabinet (12). A sheet-like moisture adsorbing material (14B), which is the other of the gas adsorbing materials, is formed by dispersing copper ion-exchanged ZSM-5 zeolite (43) in a thermoplastic resin composition (44), and is stuck on at least a section of an inner wall of the cabinet (12). This configuration allows moisture in the cabinet (12) to be rapidly adsorbed.
    Type: Application
    Filed: April 12, 2012
    Publication date: February 6, 2014
    Applicant: PANASONIC CORPORATION
    Inventor: Akiko Yuasa
  • Patent number: 8644544
    Abstract: 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.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: February 4, 2014
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Hiroshi Akino
  • Patent number: 8594357
    Abstract: 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.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: November 26, 2013
    Assignee: Bose Corporation
    Inventor: Lifun Lin
  • Publication number: 20130308812
    Abstract: 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.
    Type: Application
    Filed: May 14, 2013
    Publication date: November 21, 2013
    Applicants: AAC MICROTECH (CHANGZHOU) CO., LTD., AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) CO., LTD.
    Inventor: Tao SHEN
  • Patent number: 8526656
    Abstract: 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.
    Type: Grant
    Filed: November 13, 2009
    Date of Patent: September 3, 2013
    Assignees: Funai Electric Co., Ltd., Funai Electric Advanced Applied Technology Research Institute Inc.
    Inventors: Fuminori Tanaka, Ryusuke Horibe, Takeshi Inoda, Masatoshi Ono, Rikuo Takano, Toshimi Fukuoka
  • Publication number: 20130216084
    Abstract: 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 31 including a plurality of sound holes 32 drilled therein by acoustically closing a predetermined sound hole 32 among the plurality of sound holes 32 by a predetermined sound hole closing means, and fine adjustment is performed by applying a predetermined amount of compressive force to an acoustic resistance member 40 by an acoustic resistance adjusting means 50 (adjustment nut 51), so as to adjust acoustic resistance present in a sound wave passage from a rear acoustic terminal to the back of a diaphragm.
    Type: Application
    Filed: February 8, 2013
    Publication date: August 22, 2013
    Applicant: KABUSHIKI KAISHA AUDIO-TECHNICA
    Inventor: KABUSHIKI KAISHA AUDIO-TECHNICA
  • Patent number: 8433089
    Abstract: 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.
    Type: Grant
    Filed: November 13, 2009
    Date of Patent: April 30, 2013
    Assignees: Funai Electric Co., Ltd., Funai Electric Advanced Applied Technology Research Institute Inc.
    Inventors: Fuminori Tanaka, Ryusuke Horibe, Takeshi Inoda, Masatoshi Ono, Rikuo Takano, Toshimi Fukuoka
  • Patent number: 8397860
    Abstract: A loudspeaker enclosure accommodates at least one speaker. Sound waves emanating from the rear of the speaker exit through a port in the enclosure. The interior of the enclosure contains at least one partition to lengthen the acoustic path from the rear of the speaker to the port and to cause alternating expansion and contraction of the sound waves emanating from the rear of the speaker. The partitions are arranged in relation to the speaker(s) so as to reduce sound wave reflections that would create non-linearities in the frequency response.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: March 19, 2013
    Assignee: Rogersound Labs, LLC
    Inventor: Howard Rodgers
  • Publication number: 20130058514
    Abstract: 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.
    Type: Application
    Filed: August 30, 2012
    Publication date: March 7, 2013
    Inventor: Hiroshi Akino
  • Patent number: 8358798
    Abstract: An acoustic apparatus, including an acoustic driver, acoustically coupled to a pipe to radiate acoustic energy into the pipe. The pipe includes an elongated opening along at least a portion of the length of the pipe through which acoustic energy is radiated to the environment. The radiating is characterized by a volume velocity. The pipe and the opening are configured so that the volume velocity is substantially constant along the length of the pipe.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: January 22, 2013
    Inventors: Christopher B. Ickler, Joseph Jankovsky, Eric S. Johanson, Richard Saffran
  • Patent number: 8284977
    Abstract: A method and apparatus for a multi-chamber ported stereo speaker is disclosed. The stereo speaker is a single unit with multi-chambers in an enclosure box. The multi chamber ported speaker comprises an enclosure housing a shared acoustic chamber having an external port for allowing air external of the enclosure box to flow into the shared acoustic chamber, and at least two additional chambers comprising a corresponding internal port in each additional chamber for forming an air pass from each additional chamber with the shared chamber, each additional chamber comprising a corresponding driver mounted through a wall of the chamber and enclosure box for forming the ported speaker.
    Type: Grant
    Filed: January 24, 2008
    Date of Patent: October 9, 2012
    Assignee: Creative Technology Ltd
    Inventor: Kok Huan Ong
  • Patent number: 8256566
    Abstract: A loudspeaker enclosure accommodates at least one speaker. Sound waves emanating from the rear of the speaker exit through a port in the enclosure. The interior of the enclosure contains at least one partition to lengthen the acoustic path from the rear of the speaker to the port and to cause alternating expansion and contraction of the sound waves emanating from the rear of the speaker. The partitions are arranged in relation to the speaker(s) so as to reduce sound wave reflections that would create non-linearities in the frequency response.
    Type: Grant
    Filed: August 19, 2011
    Date of Patent: September 4, 2012
    Assignee: Rogersound Labs, LLC
    Inventor: Howard Rodgers
  • Patent number: 8189847
    Abstract: A dual-frequency coaxial earphone has a shared magnet, which is interposed between a top board of a outer yoke and an outer disk of a inner yoke, wherein the outer yoke and the inner yoke each has a different polarity. A low-frequency voice coil of a low-frequency speaker part extends axially into and between an annular wall of the outer yoke and the outer disk of the inner yoke. An inner sleeve of the inner yoke extends into a first central opening of the outer yoke. Therefore, a high frequency of the high-frequency speaker part can pass through the inner sleeve so as to energize a central diaphragm of the low-frequency speaker part and to form a same phase as, and to output frequency synchronously with, the low-frequency speaker part. As such, the problem of intermodulation of distortion for the high and low acoustic frequencies can be solved, and that dimension of the earphone can be minimized.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: May 29, 2012
    Assignee: Jetvox Acoustic Corp.
    Inventor: Fred Huang
  • Publication number: 20120128190
    Abstract: 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.
    Type: Application
    Filed: November 19, 2010
    Publication date: May 24, 2012
    Applicant: Apple Inc.
    Inventor: Ching Yu John Tam
  • Publication number: 20120063627
    Abstract: 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.
    Type: Application
    Filed: May 17, 2010
    Publication date: March 15, 2012
    Applicant: Visionarist Co., Ltd.
    Inventors: Yuji Takashima, Hiroyuki Naono
  • Patent number: 8131001
    Abstract: The present invention provides a loudspeaker diaphragm and an electrodynamic loudspeaker of an elongated shape being shorter in the minor-axis direction than in the major-axis direction, which have a desirable sound reproducing capability with a high efficiency and are not significantly influenced by divided vibrations of an elongated loudspeaker diaphragm, and which are suitably installed in devices such as display devices.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: March 6, 2012
    Assignee: Onkyo Corporation
    Inventors: Kenichiro Toyofuku, Hiroyasu Kumo, Taihei Okada
  • Patent number: 8094842
    Abstract: A loudspeaker system includes a loudspeaker enclosure having an inside space, a loudspeaker provided on the loudspeaker enclosure, a first diaphragm which has one of ends fixed to a surface of the loudspeaker enclosure and the other end, a second diaphragm which has one of ends fixed to the surface of the loudspeaker enclosure and the other end, a coupling portion having an elasticity, and coupling the other end of the first diaphragm to the other end of the second diaphragm, an opening structure provided in the surface of the loudspeaker enclosure, and a sealing member provided to a portion among the first and second diaphragms, the coupling portion and an edge part of the opening structure, and closing the inside space to hold an airtightness of the loudspeaker enclosure in a state that the first and second diaphragms can be vibrated.
    Type: Grant
    Filed: June 14, 2007
    Date of Patent: January 10, 2012
    Assignee: Yamaha Corporation
    Inventors: Masao Noro, Akira Arai
  • Patent number: 8077898
    Abstract: A dual-frequency coaxial earphone includes a frame, a shared yoke, a high frequency speaker part, and a low frequency speaker part. The high frequency speaker part and the low frequency speaker part are coaxially arranged at inside and outside of the shared yoke, and are coaxial with a central opening of the frame. Further, a permanent magnet of the higher frequency speaker part is contrary, in polarity, to an annular magnet of the low frequency speaker part. Therefore, acoustic frequency of the low frequency speaker part can be phase-countered by passing thereof through an acoustic annular recess, so that the acoustic frequency of the low frequency speaker part has the same phase as the acoustic frequency of the high frequency speaker part and both then are output synchronally. The high frequency speaker part and the low frequency speaker part can then be separated, in acoustic frequency, from each other.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: December 13, 2011
    Assignee: Jetvox Acoustic Corp.
    Inventor: Fred Huang
  • Patent number: 8045722
    Abstract: Provided are a method and apparatus for controlling a sound field through an array speaker. The method includes calculating a coefficient of a filter that controls sound pressure of an input signal, based on a sound pressure ratio of a suppression area that suppresses sound emitted from an array speaker and an emphasis area that emphasizes the sound, and sound pressure efficiency in the emphasis area, generating a plurality of output signals that focuses the sound to the emphasis area by filtering the input signal based on the calculated coefficient of the filter, and outputting a sound field controlled sound based on the generated plurality of output signals. Accordingly, a listener in a predetermined direction and distance from the array speaker can clearly hear sound, without wearing an earphone or a headset so as to focus the sound only to the listener.
    Type: Grant
    Filed: April 30, 2008
    Date of Patent: October 25, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jung-woo Choi, Young-tae Kim, Jung-ho Kim, Sang-chul Ko
  • Patent number: 8036411
    Abstract: There are provided a speaker for outputting sound, a plurality of sound output holes formed in a reverse side cabinet, a mesh sheet, a two-sided tape, and a transparent sheet. The sound output holes, the mesh sheet, the two-sided tape, and the transparent sheet control the direction of sound output from the speaker.
    Type: Grant
    Filed: July 28, 2006
    Date of Patent: October 11, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kenzoh Daimon, Kimiaki Imai
  • Patent number: 7912238
    Abstract: A speaker attenuation system includes an attenuating member comprised of suitable material and having a size and a shape capable of attenuating a speaker when positioned in a central beam region of the speaker. A positioning mechanism is capable of positioning the attenuating member predominantly in the central beam region of the speaker in such a manner that it is between the speaker and an audience in a performance setting. The suitable material, such as open cell foam (i.e., acoustic foam), preferably has a property that it is capable, at one or more thicknesses, of reducing amplitudes of a majority of frequencies between one-thousand and eight-thousand Hertz by at least six decibels without reducing amplitudes of any frequencies in that range by more than eighteen decibels. Accordingly, the “beaminess” of the speaker can be reduced without creating a “hole in the sound.
    Type: Grant
    Filed: January 13, 2006
    Date of Patent: March 22, 2011
    Inventor: Frank LaMarra
  • Publication number: 20110051970
    Abstract: 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.
    Type: Application
    Filed: November 4, 2010
    Publication date: March 3, 2011
    Inventor: Todd K. Jenkins
  • Publication number: 20100142743
    Abstract: 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.
    Type: Application
    Filed: November 13, 2009
    Publication date: June 10, 2010
    Inventors: Fuminori Tanaka, Ryusuke Horibe, Takeshi Inoda, Masatoshi Ono, Rikuo Takano, Toshimi Fukuoka
  • Publication number: 20100142742
    Abstract: 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.
    Type: Application
    Filed: November 13, 2009
    Publication date: June 10, 2010
    Inventors: Fuminori Tanaka, Ryusuke Horibe, Takeshi Inoda, Masatoshi Ono, Rikuo Takano, Toshimi Fukuoka
  • Patent number: 7711135
    Abstract: In order to divide the inside space of the cabinet into at least two with a speaker being the center, obtain a plurality of emitted sound energies through openings constructed in each divided sphere, and utilize a cabinet of a loudspeaker apparatus as a sound echo box, a partition wall 4 is disposed at a right angle to a baffle board 2 or a front board 7, passing through the center O of a speaker 3 disposed on the baffle board 2 or the front board 7 of the cabinet 6, and divides the inside space of the cabinet 6 into at least two of an upper chamber 11U and a lower chamber 11D, so that sound energies are emitted from openings 8 and 9 which are provided in each chamber of 11D and 11U, respectively.
    Type: Grant
    Filed: April 30, 2002
    Date of Patent: May 4, 2010
    Inventor: Teruo Tsutsumi
  • Patent number: 7668331
    Abstract: An improved-fidelity speaker system is presented. The sound system includes a frame and a pair of matching speakers. The frame is formed to hold a first speaker and a second speaker, each having a front side, a back side, and central axis. When attached with the frame, the two speakers are substantially aligned along their central axes in a configuration selected from a group consisting of being mounted in the frame such that the front sides of the speakers are facing away from each other, and being mounted in the frame such that the front sides of the speakers are facing towards each other. When the speakers are operated in unison, a sound wave is generated and pushed outward from the frame and approximately radially from the central axes of the speakers in up to 360 degrees, expanding outward about a plane approximately perpendicular to the central axes.
    Type: Grant
    Filed: October 7, 2005
    Date of Patent: February 23, 2010
    Inventor: Wailit Yen
  • Publication number: 20090316920
    Abstract: 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.
    Type: Application
    Filed: September 3, 2009
    Publication date: December 24, 2009
    Inventors: Toshiyuki MATSUMURA, Shuji Saiki, Sawako Kano, Mitsukazu Kuze