Bass Reflex (e.g., Rear Wave) Patents (Class 381/349)
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Patent number: 7953239Abstract: A speaker system with an enclosure having at least six sides. At least two active transducers are mounted inside the enclosure. Each active transducer is oriented to project from one of the sides. At least four passive radiators are mounted inside the enclosure. Each passive radiator is oriented to project from one of the sides. The number of active transducers and passive radiators equals the number of sides on the enclosure.Type: GrantFiled: February 16, 2007Date of Patent: May 31, 2011Assignee: Harman International Industries, IncorporatedInventor: William Andrew Decanio
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Patent number: 7928303Abstract: An apparatus is provided for lowering the fundamental frequency of a cajon drum. A first side wall of the cajon drum is the drumhead. An opening is formed in a second side wall, wherein the opening may be circular, oval, rectangular or other shape. An insert having a cross-section conforming to the shape of the opening is slid into the opening and mounted to the side wall in which the opening is formed. Various techniques for connecting the insert to the side wall of the drum are disclosed. The insert may be fitted into the drum opening during the initial manufacture of the drum.Type: GrantFiled: August 26, 2009Date of Patent: April 19, 2011Assignee: Riley Investments LLCInventors: Samuel Earl Millender, Jr., Jesse M. Bradman
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Patent number: 7925036Abstract: A loudspeaker has a loudspeaker driver and a first tube having a base end coupled to the driver and extending towards the rear end of the loudspeaker. A second tube of larger cross sectional dimensions extends over the first tube and loudspeaker driver and has a rear end wall spaced from the open rear end of the second tube and a front end coupled to the driver. A third, open ended tube of smaller cross-sectional dimensions than the first tube extends through a rear end wall of the second tube and into the first tube, with the front end of the third tube spaced from the base of the first tube. A folded, three segment transmission line is formed between the first and second tubes, between the second and third tubes, and through the third tube.Type: GrantFiled: August 28, 2008Date of Patent: April 12, 2011Inventor: Peter M. Bouvier
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Publication number: 20110081035Abstract: An in-ear device comprises inter alia a miniaturized receiver assembly of sandwich construction with a front plate and a back plate and an electro-dynamic receiver therebetween, the assembly providing a bass-reflex design with a front resonator.Type: ApplicationFiled: October 5, 2010Publication date: April 7, 2011Inventors: Stéphane Dedieu, Ian McIntosh
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Patent number: 7894614Abstract: A system and method for achieving extended low-frequency response and increased low-frequency sound pressure output capability in a loudspeaker system is provided. The system and method comprise mounting a low-frequency driver in a ported box, tuning the ported box to a sufficiently low frequency so as to result in a frequency response that can be modeled substantially as a second-order response, and equalizing the response of said driver-box combination with a second-order biquadratic filter function to achieve the desired frequency response characteristic.Type: GrantFiled: October 15, 2004Date of Patent: February 22, 2011Inventor: Robert Roger Cordell
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Patent number: 7886869Abstract: An acoustic device including a first acoustic waveguide having two open ends; a second acoustic waveguide; and an acoustic driver having a first and second radiating surface positioned so that the first: radiating surface radiates into the first waveguide and the second surface radiates into the second waveguide. An acoustic device including an acoustic driver and an acoustic waveguide with two open ends. A method for making the acoustic device.Type: GrantFiled: September 27, 2007Date of Patent: February 15, 2011Inventors: Kevin Bastyr, Hidehiko Fukushima
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Publication number: 20110019855Abstract: Provided is an enclosure including a rear chamber, a speaker unit chamber disposed adjacent to the rear chamber and connected to the rear chamber such that air flows between the speaker unit chamber and the rear chamber, a front chamber disposed adjacent to the speaker unit chamber and connected to the speaker unit chamber such that air flows between the speaker unit chamber and the front chamber, and a duct having a first side connected to the front chamber such that air flows between the front chamber and the duct and a second side opened to the outside, wherein the rear chamber, the speaker unit chamber, the front chamber, and the duct are disposed between a first plate and a second plate that are spaced apart from each other.Type: ApplicationFiled: January 7, 2010Publication date: January 27, 2011Applicant: Samsung Electronics Co., Ltd.Inventors: Gyeong-tae LEE, Jong-bae KIM
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Publication number: 20100329497Abstract: This is a novel speaker design which introduces its own internal bass-reflex. This design improves over existing designs in that it leads to acoustics that are more natural and of higher quality and, that it also leads to much improved cooling for the speaker's voice coil.Type: ApplicationFiled: June 30, 2009Publication date: December 30, 2010Inventor: Srdjan Perovic
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Publication number: 20100329496Abstract: Apparatus includes a housing, the housing including a first body part and a second body part, the first body part being moveable relative to the second body part, wherein the housing has a first configuration when the first body part is in a first position relative to the second body part between and a second configuration when the first body part is in a second position relative to the second body part; and a speaker arrangement, wherein the speaker arrangement comprises a transducer, a front cavity coupled to a first side of the transducer, and an opening. The opening connects the front cavity to an exterior of the housing. A rear cavity is coupled to a second side of the transducer, the second side of the transducer being on an opposite side of the transducer to the first side of the transducer.Type: ApplicationFiled: June 30, 2009Publication date: December 30, 2010Inventors: Pekka Mottonen, Hong-Jae Park, Koray Ozcan
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Patent number: 7831057Abstract: 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: GrantFiled: January 5, 2007Date of Patent: November 9, 2010Assignee: Audiovox CorporationInventor: Todd K. Jenkins
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Patent number: 7813770Abstract: A speaker module and a mobile device having the speaker module are provided herein. The speaker module includes a speaker unit and a speaker box. The speaker box has a wall defining an aperture receiving the speaker unit therein. The speaker box has a first speaker chamber, a second speaker chamber and a connecting section connecting the first speaker chamber and the second speaker chamber. The cross-sectional height of the space of the connecting section is lower than that of the first speaker chamber or the second speaker chamber. In other option, the space of the connecting section is smaller than that of the first speaker chamber or the second speaker chamber.Type: GrantFiled: August 14, 2007Date of Patent: October 12, 2010Assignee: HTC CorporationInventors: San-Chi Ho, Kar-Chai Luk, Teerada Sirirattanasit
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Patent number: 7764806Abstract: A speaker set (10) includes an enclosure (11) extending two spaced supporting portions (118) from a bottom side thereof for contacting with a supporting member (20); a woofer (12), two mid-frequency speakers (13), and two tweeters (14) are disposed in the enclosure; a circuitry electrically connects with the woofer, the mid-frequency speakers, and the tweeters; two woofer chambers (121, 123) are disposed at two opposite sides of a diaphragm of the woofer. One of the woofer chambers is defined between the bottom side of the enclosure, the supporting portions of the enclosure and the supporting member, whilst the other one of the woofer chambers is defined in the enclosure. Sound generated by the woofer emanates to a surrounding environment through both the woofer chambers, wherein the enclosure defines a plurality of venting holes (122) communicating with the other one of the woofer chambers.Type: GrantFiled: July 28, 2006Date of Patent: July 27, 2010Assignee: Foxconn Technology Co., Ltd.Inventors: Hsien-Sheng Pei, Tsung-Lung Yang
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Patent number: 7711134Abstract: This invention provides a speaker port with a flare having an inner wall that minimizes or reduces boundary layer separation. Fluids, such as air and sound waves, flow through the port at a higher velocity when boundary layer separation is minimized or reduced. The inner wall of the port is contoured so that the pressure gradient or change in pressure along the longitudinal axis of the port from its inlet duct to outlet duct is substantially constant.Type: GrantFiled: June 24, 2002Date of Patent: May 4, 2010Assignee: Harman International Industries, IncorporatedInventors: Brendon Stead, Clayton Williamson
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Patent number: 7711135Abstract: 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: GrantFiled: April 30, 2002Date of Patent: May 4, 2010Inventor: Teruo Tsutsumi
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Publication number: 20100086145Abstract: A thin loudspeaker system has at least one contoured passive radiator enclosure outside the main unit, connected with at least one loudspeaker enclosure inside the main unit through at least one transmission line. The transmission line cross-sectional shape may be a circular, rounded rectangular, ovular, elliptical or any other suitable shape. With this method the diaphragm size of the contoured passive radiator may be as large as possible, without changing the thickness of main unit. The larger-sized passive radiator diaphragm may increase the air movement and as a result may increase sound pressure level (SPL) at low frequencies. This system may reduce the thickness of audio video equipment significantly and may be useful for producing deeper bass at low frequencies with less distortion, for thin equipment such as LCD TVs, plasma TVs, thin audio hi-fi system, car loudspeaker system, and other similar systems.Type: ApplicationFiled: October 2, 2008Publication date: April 8, 2010Applicant: PT. HARTONO ISTANA TEKNOLOGIInventors: J. Dwidjaja Setiabudi, Adisusanto, Setiawan Yusran, Hadi Prajitno, Nafis Dwi Cahyo, Bismo Ragil Saputro, Fx Darmojo Sakti, Ahmad Sugiharto, Heru Mulyatmo
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Patent number: 7680293Abstract: A loudspeaker apparatus includes a speaker unit and a front cover. The speaker unit generates acoustic waves according to an external electronic signal. The front cover located in front of the speaker unit includes a plurality of elastic spacers and a diaphragm, and the elastic spacers and the diaphragm form an enhanced chamber, such, that the acoustic waves generated by the speaker unit go through the enhance chamber, and then drives the diaphragm to generate the acoustic waves again.Type: GrantFiled: October 31, 2005Date of Patent: March 16, 2010Assignee: Lite-On Technology CorporationInventors: Chi-Hsiung Lin, Hsiang-Ti Hsu
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Patent number: 7676047Abstract: A method for processing a multichannel audio signal. The method includes mounting electroacoustical transducers in a low frequency augmenting device. The electroacoustical transducers radiate different high frequency acoustic energy and common low frequency acoustic energy. The transducers may be part of directional arrays. The method is applied to multimedia entertainment devices.Type: GrantFiled: March 7, 2003Date of Patent: March 9, 2010Assignee: Bose CorporationInventors: J. Richard Aylward, Charles R. Barker, III
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Patent number: 7668331Abstract: 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: GrantFiled: October 7, 2005Date of Patent: February 23, 2010Inventor: Wailit Yen
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Patent number: 7664283Abstract: The invention concerns an acoustic device with electro-acoustic transducers and with a cavity resonator that provide extreme tri-dimensional to concentrate/diffuse infrasonic, sonic and ultrasonic waves. It also concerns many structural designs in which some models of cavity resonators and all their transducers are appropriately arranged on the basis of the different uses; so doing it is possible to achieve numerous interacting operational set-ups (basic configuration systems) that can be used in the medical sector, in industry or in the home, in entertainment and leisure. Differently to previously known techniques the acoustic device according to this patent is also a highly sophisticated cybernetic apparatus for the reproduction of various tri-dimensional sound fields that are identical to the original ones, or for generating completely new ones. This acoustic device can be compared to a Helmholtz resonator that transmits sound-waves/harmonic frequencies rather than receiving them.Type: GrantFiled: October 13, 2005Date of Patent: February 16, 2010Inventor: Daniele Ramenzoni
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Patent number: 7643643Abstract: A speaker unit is arranged in a casing of an electronic apparatus. The speaker unit includes a cabinet, a speaker arranged in the cabinet and exposed to the outside of the cabinet, and a port which is defined in the cabinet to open the outside of the cabinet and through which a sound emitted from the backside of the speaker into the cabinet is radiated outward from the cabinet. The speaker is exposed to the outside of the casing through an opening defined in an outside wall of the casing. The port of the speaker unit opens into the casing.Type: GrantFiled: April 1, 2004Date of Patent: January 5, 2010Assignee: Kabushiki Kaisha ToshibaInventor: Tomofumi Miyamoto
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Patent number: 7624839Abstract: A compact loudspeaker enclosure combines planar type devices for high frequency sound reproduction and cone type active devices for low frequency sound reproduction. The low frequency cone type transducers are mounted in baffles between forward and rear enclosed spaces and thus do not directly radiate into the environment. The first enclosed space is acoustically coupled to the environment by the planar device which is mounted between the first enclosed space and the environment with one major face mounted to radiate either directly into the environment or to be horn loaded. The planar operates as a passive radiator to the LF devices at low frequencies and an active device above a crossover frequency.Type: GrantFiled: May 12, 2006Date of Patent: December 1, 2009Inventor: Curtis E. Graber
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Patent number: 7610991Abstract: A speaker contains a pipe member containing opposed ends and a sounding body that is driven on the basis of an acoustic signal which is applied to the sounding body. The sounding body is arranged on the same axis as that of the pipe member. Sound wave radiated from the sounding body radiates from the opposed ends of the pipe member.Type: GrantFiled: February 8, 2007Date of Patent: November 3, 2009Assignee: Sony CorporationInventors: Nobukazu Suzuki, Masaru Uryu, Yoshio Ohashi
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Publication number: 20090268934Abstract: The invention relates to a reflex loudspeaker construction (1, 2, 3), which comprises a loudspeaker chamber (30) delimited by the reflex loudspeaker construction (1, 2, 3), a reflex channel (5) connected to the loudspeaker chamber (30), which connects the loudspeaker chamber (30) to the external space of the reflex loudspeaker construction (1, 2, 3), and at least one loudspeaker element (7) connected to the reflex loudspeaker construction (1, 2, 3), which forms part of the structure delimiting the loudspeaker chamber (30). According to the invention, the reflex loudspeaker construction (1, 2, 3) comprises at least two components (2, 3), which can be repeatedly detached at least partly from each other, without dismantling, in order to use the loudspeaker chamber (30) as a transportation space.Type: ApplicationFiled: October 4, 2006Publication date: October 29, 2009Applicant: GENELEC OYInventor: Ilpo Martikainen
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Patent number: 7578368Abstract: A speaker set (20) for an electronic product (100) includes a hollow shell (60), and a loudspeaker (50) accommodated in the shell. The shell includes at least a spacing plate (68) which divides an inner space of the shell into a first resonance chamber (61a) and a second resonance chamber (61b). The loudspeaker includes first tone holes (52) communicating with the first resonance chamber and second tone holes (54) communicating with the second resonance chamber. The second resonance chamber communicates with the first resonance chamber via at least an inverted hole (69) defined in the at least a spacing plate. The first resonance chamber communicates with a surrounding environment so that sound emitted from the first and second tone holes of the loudspeaker can be transferred to the surrounding environment.Type: GrantFiled: March 7, 2007Date of Patent: August 25, 2009Assignee: Foxconn Technology Co., Ltd.Inventors: Tsung-Lung Yang, Hsien-Sheng Pei
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Patent number: 7578367Abstract: An electronic product (100) includes a casing (10) containing a speaker set (20) therein. The speaker set includes a hollow shell (60) and a loudspeaker (50). The loudspeaker is accommodated in the shell, dividing an inner space of the shell into a first resonance chamber (61a) and a second resonance chamber (61b). The loudspeaker includes first tone holes (52) communicating with the first resonance chamber and second tone holes (54) communicating with the second resonance chamber. The first resonance chamber communicates with the second resonance chamber via at least an inverted tube (69).Type: GrantFiled: March 7, 2007Date of Patent: August 25, 2009Assignee: Foxconn Technology Co., Ltd.Inventors: Tsung-Lung Yang, Hsien-Sheng Pei
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Publication number: 20090208048Abstract: A loudspeaker (13, 16) comprises an electro dynamic transducer (1) and a bass reflex enclosure (14, 17), in which the electro dynamic transducer (1) is mounted. The diaphragm (2) of the transducer, when driven, vibrates in a rocking mode with a rocking frequency and the bass reflex enclosure (14, 17) is tuned to the rocking frequency.Type: ApplicationFiled: May 5, 2007Publication date: August 20, 2009Applicant: NXP B.V.Inventor: Christian Haas
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Publication number: 20090202095Abstract: There is provided a speaker device in which a baffle plate that forms an acoustic space is formed of a resin material, and a step is provided at an opening for fixing a diaphragm in this baffle plate so that the diaphragm is positioned by this step. It is thereby possible to improve strength of the baffle plate and strength of the speaker device.Type: ApplicationFiled: January 30, 2006Publication date: August 13, 2009Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Hiroshi Yano, Takeshi Shimokawatoko, Kazuki Honda
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Patent number: 7556121Abstract: A mobile phone (1) includes a casing (10) containing a printed circuit board (28) and an antenna (29) therein; and a speaker set (20) is disposed between the printed circuit board and the antenna. The speaker set includes a hollow shell (21) including a first chamber (220), a second chamber (230) and a third chamber (240) isolated from the second chamber, and a loudspeaker (25) accommodated in first chamber of the shell and dividing the first chamber into a front chamber (224) and a rear chamber (223). The front chamber communicates with the second chamber, whilst the rear chamber communicates with the third chamber.Type: GrantFiled: December 15, 2006Date of Patent: July 7, 2009Assignee: Foxconn Technology Co., Ltd.Inventors: Tsung-Lung Yang, Hsien-Sheng Pei
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Patent number: 7536024Abstract: A loudspeaker comprising a loudspeaker drive unit being operable to radiate sound in a forward direction and a rearward direction and an enclosure configured to receive sound radiated in the rearward direction. The enclosure comprises a passageway system comprising a plurality of parts of different lengths. Each of the different length parts has an opening, whereby rearward radiated sound induces standing wave resonances of air in the different length parts at different fundamental frequencies.Type: GrantFiled: May 13, 2005Date of Patent: May 19, 2009Assignee: Mordaunt-Short Ltd.Inventors: Daniel Bailey, Graeme Foy
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Patent number: 7508933Abstract: A cellular phone having a first opening for delivering voice on a shell is provided. A printed circuit board (PCB) is disposed within an inner space enclosed by the shell and divides the inner space into a first acoustic room and a second acoustic room. A speaker is disposed within the first acoustic room and electrically connects the PCB. A through hole is formed on the PCB to communicate the first acoustic room and the second acoustic room to increase the size of total resonance chamber for improving resonance effect in low frequency voices. Furthermore, at least a second opening is formed on the shell to communicate the first acoustic room or the second acoustic room to the environment for flattening the resonance curve to improve the voice quality.Type: GrantFiled: January 31, 2005Date of Patent: March 24, 2009Assignee: BenQ CorporationInventor: Tsung-Lung Yang
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Patent number: 7503422Abstract: An in-wall or ceiling speaker enclosure (10) having a predetermined air volume is provided, and includes a housing (22) designed to support a speaker assembly (18) between a pair of adjacent wall studs (12,14). The enclosure (10) also has an expandable air chamber (24) of predetermined volume operably coupled and in communication with housing (22). The enclosure (10) can be easily mounted within a pre-cut wall opening (32) of minimal size.Type: GrantFiled: December 8, 2005Date of Patent: March 17, 2009Assignee: Induction Dynamics LLCInventors: Christopher Combest, Ken Hecht
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Publication number: 20090052694Abstract: A multiplier 3 multiplies a square wave signal A(?,t) by a low frequency component signal L(?,t) to generate an even-order harmonic component signal B(?,t). A multiplier 4 multiplies the even-order harmonic component signal B(?,t) by the low frequency component signal L(?,t) to generate an odd-order harmonic component signal C(?,t). An adder 5 adds the even-order harmonic component signal B(?,t) and the odd-order harmonic component signal C(?,t) to generate the harmonic component signal D(?,t).Type: ApplicationFiled: August 7, 2008Publication date: February 26, 2009Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Takashi YAMAZAKI, Masaru Kimura
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Patent number: 7481295Abstract: A speaker system, includes a speaker enclosure that has a surface, a speaker that is mounted in the speaker enclosure, a vibration portion that has one end fixed on the surface of the speaker enclosure so as to be allowed to vibrate elastically, an opening portion that is provided in the surface where the vibration portion is provided, and disposed in a position corresponding to a vibration region of the vibration portion and a sealing member that covers a gap formed between the vibration portion and a rim portion of the opening portion while enabling vibration of the vibration portion so as to keep the speaker enclosure airtight.Type: GrantFiled: June 21, 2006Date of Patent: January 27, 2009Assignee: Yamaha CorporationInventors: Masao Noro, Akira Arai
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Publication number: 20090016556Abstract: On-board model railroad speaker enclosure designs are presented that allow maximum sized speakers, improve impedance matching of sound to the outside of the locomotive, and isolate back and front speaker waves while maintaining the standard horizontal drive-train in model train locomotives.Type: ApplicationFiled: July 18, 2008Publication date: January 15, 2009Inventor: Frederick E. Severson
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Patent number: 7477755Abstract: A speaker system according to the present invention comprises a cabinet (10), a speaker unit (11), a first parting board (12), a drone cone (13), an adsorption member (14), a second parting board (15), a backboard (16), a variable mechanism (17), and a port (18). A sound pressure generated by the speaker unit (11) causes a pressure variation in a second chamber (R12) via the drone cone (13). The adsorption member (14) with an effect of physical adsorption is operable to suppress the pressure variation. Furthermore, by displacing the diaphragm (171), the variable mechanism (17) is operable to reduce a pressure variation of a direct current component, which is caused by variations in ambient temperature or atmospheric pressure of the speaker system.Type: GrantFiled: March 23, 2005Date of Patent: January 13, 2009Assignee: Panasonic CorporationInventors: Shuji Saiki, Mitsukazu Kuze, Toshiyuki Matsumura, Sawako Kano
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Publication number: 20090003639Abstract: An acoustic waveguide system, having source of acoustic radiation and a source of opposing acoustic radiation. An acoustic waveguide has an open end and an interior. A first acoustic driver having a first radiating surface and a second radiating surface is arranged and constructed so that the first radiating surface radiates sound waves into free air and the second radiating surface radiates sound waves into the acoustic waveguide so that sound waves are radiated at the open end. A source of opposing sound waves in the acoustic waveguide opposes a predetermined spectral component of the sound waves radiated into the acoustic waveguide to reduce the acoustic radiation of the predetermined spectral component from the acoustic waveguide.Type: ApplicationFiled: June 27, 2008Publication date: January 1, 2009Applicant: Bose CorporationInventor: J. Richard Aylward
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Patent number: 7463747Abstract: A loudspeaker unit (2) of a loudspeaker system (1) is fitted to a cabinet (4). An absorbent (3) is disposed in a hollow chamber (R) inside the cabinet (4) and absorbs a gas inside the hollow chamber (R). A phase inverting mechanism (8) inverts the phase by resonating with a sound of a specific frequency radiated from the loudspeaker unit (2) into the hollow chamber (R) and radiates this sound to outside. The watertight means of the phase inverting mechanism (8) prevents invasion of moisture into inside the hollow chamber (R) from outside the cabinet (4) through the phase inverting mechanism (8).Type: GrantFiled: March 24, 2005Date of Patent: December 9, 2008Assignee: Panasonic CorporationInventors: Mitsukazu Kuze, Shuji Saiki, Sawako Kano, Toshiyuki Matsumura
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Patent number: 7461718Abstract: An improvement is provided in loudspeaker enclosures characterised by a frequency response having at least one null due to a cavity mode. The improvement comprises introducing an aperture at a high pressure region of said enclosure for provided a pressure leak thereby substantially eliminating said at least one null.Type: GrantFiled: December 10, 2004Date of Patent: December 9, 2008Assignee: Mitel Networks CorporationInventors: Stephane Dedieu, Philippe Moquin
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Patent number: 7454025Abstract: In a loudspeaker device of the present invention, an interior space of a cabinet is parted into first and second chambers, a diaphragm on which ring-shaped magnetic boards are fixed is attached to a parting board via an edge portion, and ring-shaped fixed magnets are provided so as to face the magnetic boards, respectively. Vibration of the diaphragm vibrated by sound pressure from a speaker unit is intensified by forces of attraction of the magnets in order to reduce an acoustic stiffness of the cabinet and equivalently increase a cabinet volume, thereby realizing satisfactory bass reproduction with a small cabinet.Type: GrantFiled: June 7, 2004Date of Patent: November 18, 2008Assignee: Panasonic CorporationInventor: Shuji Saiki
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Patent number: 7448467Abstract: An acoustic enclosure such as a loudspeaker (10) uses within the cabinet adsorbent material, and/or containment means (22) for the adsorbent material, which is at least partially hydrophobic. Preferably, the material is activated carbon treated to provide it with hydrophobic properties. Preferably, the adsorbent material is treated with a silicon-containing compound. This improves the acoustic compliance of the acoustic enclosure.Type: GrantFiled: July 26, 2002Date of Patent: November 11, 2008Assignees: KH Technology Corporation, Sutcliffe Speakman LimitedInventors: Julian Wright, Thomas Anthony Ryan
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Patent number: 7436972Abstract: A loudspeaker has a loudspeaker driver and a first tube having a base end coupled to the driver and extending towards the rear end of the loudspeaker. A second tube of larger cross sectional dimensions extends over the first tube and loudspeaker driver and has a rear end wall spaced from the open rear end of the second tube and a front end coupled to the driver. A third, open ended tube of smaller cross-sectional dimensions than the first tube extends through a rear end wall of the second tube and into the first tube, with the front end of the third tube spaced from the base of the first tube. A folded, three segment transmission line is formed between the first and second tubes, between the second and third tubes, and through the third tube.Type: GrantFiled: June 28, 2006Date of Patent: October 14, 2008Inventor: Peter M. Bouvier
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Publication number: 20080205682Abstract: 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 ISO degree angle or about a 90 degree angle.Type: ApplicationFiled: January 5, 2007Publication date: August 28, 2008Inventor: Todd K. Jenkins
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Patent number: 7416048Abstract: A portable terminal apparatus with a telephone function such as a portable telephone, for efficiently emitting a voice from a speaker from both a front face and a backside of a housing. The portable terminal has: a first cover that includes a first sound outlet for emitting a sound from the speaker through the front of the portable terminal apparatus; a second cover that includes a second sound outlet for emitting a sound from the speaker through the back of the portable terminal apparatus; and a gasket accommodated at a position sandwiched between the first cover and the speaker.Type: GrantFiled: November 12, 2004Date of Patent: August 26, 2008Assignee: Fujitsu LimitedInventors: Manabu Hongo, Yoshiaki Kato, Nariyasu Hayakawa, Toshikazu Ishioka, Hiroaki Sakashita, Yoshifumi Kajiwara, Hidehiko Hizuka
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Patent number: 7418104Abstract: A speaker system having a first speaker, a second speaker, and a housing having a first mounting surface to which the first speaker is mounted and a second mounting surface to which the second speaker is mounted. The first mounting surface and the second mounting surface are substantially planar and abut one another to form an included angle of between 120 degrees and 140 degrees. By so arranging the mounting surfaces, the sound produced by each speaker is allowed to mix to provide a full sound.Type: GrantFiled: August 6, 2002Date of Patent: August 26, 2008Inventor: Robert G. Spinale
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Publication number: 20080199033Abstract: A speaker system with an enclosure having at least six sides. At least two active transducers are mounted inside the enclosure. Each active transducer is oriented to project from one of the sides. At least four passive radiators are mounted inside the enclosure. Each passive radiator is oriented to project from one of the sides. The number of active transducers and passive radiators equals the number of sides on the enclosure.Type: ApplicationFiled: February 16, 2007Publication date: August 21, 2008Inventor: William Andrew Decanio
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Patent number: 7410029Abstract: A bass reflex type loudspeaker apparatus is provided in which a long route of a bass reflex duct is obtained in the case where a loudspeaker box is made thin. The bass reflex duct is provided in the loudspeaker box such that the route thereof is extended in a direction perpendicular to an anteroposterior direction of the loudspeaker apparatus and is curved.Type: GrantFiled: March 1, 2006Date of Patent: August 12, 2008Assignee: Sony CorporationInventor: Hideo Tanaami
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Patent number: 7400910Abstract: The present invention relates to a mobile terminal such as a mobile telephone or the like which has a speaker built in, and realizes a sound emission structure for separately extracting the front output and back output of the speaker in a plurality of directions. The construction of this mobile terminal comprises a first sound emission part which is formed in one surface part of a case having a speaker built in, and which conducts the front output of the speaker to the outside of the case, a sound conducting hole which is formed in case internal members disposed inside the case, and which causes the back output of the speaker to pass through the interior of the case, and conducts this output to the other surface of the case, and a second sound emission part which is formed in the other surface part of the case, and which conducts the back output from the sound conducting hole to the outside of the case.Type: GrantFiled: June 10, 2004Date of Patent: July 15, 2008Assignees: Fujitsu Limited, NTT DoCoMo, Inc.Inventors: Yoshiya Matsumoto, Kouji Hirata, Yoshito Fukata, Katsushige Kohri
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Publication number: 20080137894Abstract: A loudspeaker system has a front loudspeaker enclosure (30) having at least one first loudspeaker (20) and a rear loudspeaker enclosure (50) having at least one second loudspeaker (60). The rear loudspeaker enclosure (50) is in the form of a bandpass enclosure.Type: ApplicationFiled: December 7, 2007Publication date: June 12, 2008Applicant: d&b audiotechnik AGInventor: Matthias Christner
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Patent number: 7284637Abstract: In a low-frequency sound reproducing speaker apparatus of Kelton type, a cabinet for containing a speaker unit is constituted by a shape of substantially a parallelepiped slender in a front and rear direction, a length dimension in the front and rear direction is set to a value substantially near to a depth dimension of a seat cushion of a vehicle, the speaker unit is attached to a partition plate for partitioning inside of the cabinet into front and rear air chambers, and a lower face of the cabinet is fixed to the seat cushion by a fixing belt laid along the front and rear direction.Type: GrantFiled: February 15, 2006Date of Patent: October 23, 2007Assignees: Pioneer Corporation, Tohoku Pioneer Corporation, Pioneer Design CorporationInventors: Yasuhisa Abe, Chuichi Endo, Koji Nakane, Yumi Takigami
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Patent number: 7269270Abstract: The frequency at which standing waves occur in a loudspeaker enclosure may be reduced by the addition of an internal barrier to the enclosure in order to lengthen the effective length of an internal dimension of the enclosure. Additionally, the internal barrier may be configured such that it forms a resistive coupling between two sides of the barrier. By configuring the internal barrier to form a resistive coupling, aberrations in the frequency response of the loudspeaker caused by certain standing waves may be dampened.Type: GrantFiled: October 17, 2002Date of Patent: September 11, 2007Assignee: Bose CorporationInventors: Eric J. Freeman, Timothy Holl