Plural Dependent Diaphragms Patents (Class 181/163)
  • Patent number: 11159864
    Abstract: Various embodiments of a speaker and a method of forming such speaker are disclosed. The speaker includes a frame having a first major surface, a second major surface, and an opening disposed between the first and second major surfaces; a cone disposed adjacent the first major surface of the frame; and an adhesive layer disposed on at least a portion of the second major surface of the frame. The adhesive layer occludes the opening of the frame.
    Type: Grant
    Filed: December 19, 2019
    Date of Patent: October 26, 2021
    Assignee: Medtronic, Inc.
    Inventors: Nathan L. Olson, Joseph Ippolito, Matthew Saterbak, Luke T. Babler, Thai Nguyen
  • Patent number: 10873801
    Abstract: A speaker includes a casing, a first diaphragm and a second diaphragm. The casing encloses a first sound chamber and a second sound chamber independent of each other. The casing has a dividing wall, and the dividing wall blocks between the first sound chamber and the second sound chamber. The first diaphragm is disposed in the first sound chamber, the second diaphragm is disposed in the second sound chamber, and the vibration frequency of the second diaphragm is higher than the vibration frequency of the first diaphragm.
    Type: Grant
    Filed: December 5, 2019
    Date of Patent: December 22, 2020
    Assignees: Ampacs Corporation, Dongguan Yi Xin Electronic Technology Co., Ltd
    Inventor: Hsiu-Chen Hsu
  • Patent number: 10225633
    Abstract: An apparatus comprising at least one sound aperture configured to be acoustically coupled to an air displacement component, wherein the at least one sound aperture configured to produce a magnetically shielded region to form a trap for particles.
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: March 5, 2019
    Assignee: Nokia Technologies Oy
    Inventors: Andreas Frömel, Jani Kuivalainen
  • Patent number: 10194245
    Abstract: Circumferential mode vibrations, in a diaphragm of an acoustic transducer, are damped by defining at least one elongated opening extending radially along a portion of a length from the central area to the outer perimeter being covered by a material having higher damping properties than the material of the cone.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: January 29, 2019
    Assignee: Bose Corporation
    Inventor: Mark A. Pircaro
  • Patent number: 10090744
    Abstract: A vibration motor is provided in the present disclosure. The vibration motor includes a housing providing an accommodating space, and a first vibration system and a second vibration system elastically suspended within the accommodating space. The first vibration system includes at least one permanent magnet, and the second vibration system includes at least one magnetic force generation part opposite to the permanent magnet. A magnetic field generated by the magnetic force generation part interacts with the permanent magnet to drive the first vibration system and the second vibration system to vibrate in the housing.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: October 2, 2018
    Assignee: AAC Technologies Pte. Ltd.
    Inventors: Xingzhi Huang, Hongxing Wang, Rongguan Zhou
  • Patent number: 9967654
    Abstract: A modular speaker includes at least an active vibrator, at least a passive vibrator, and a module housing, wherein the active vibrator and the passive vibrator are coupled to the module housing to form a vibration cavity therewithin to share with the active vibrator and the passive vibrator. When the active vibrator is operated for sound generation in response to an audio signal input, the passive vibrator is driven to vibrate through the vibration cavity for auxiliary sound generation so as to produce a point sound with full range of frequencies. The point sound with full range of frequencies produced by the modular speaker includes treble region and bass region, such that the modular speaker is able to completely restore the audio signal input as the original form to enable the listener to hear the sound quality of original raw audio signal.
    Type: Grant
    Filed: October 28, 2014
    Date of Patent: May 8, 2018
    Assignee: TANG BAND INDUSTRIES CO., LTD.
    Inventor: Hsinmin Huang
  • Patent number: 9967673
    Abstract: An acoustic transducer comprises one or more electromagnetic motors that drive one or more sets of multiple diaphragms to provide acoustically efficient loudspeaker systems having dimensions that allow use in applications that would be difficult or impossible with traditional transducers. The diaphragms may be driven directly, inertially or fluidically. If diaphragms are driven by rods that pass through holes in the diaphragms, noise may be generated by air that leaks through the pass-through holes. This noise may be reduced or eliminated by measures that reduce or eliminate the air leakage.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: May 8, 2018
    Assignee: TYMPHANY HK LIMITED
    Inventors: Andrew David Unruh, Robert J. True, Edward T. Norcott, Jr., Jens-Peter Axelsson, Alireza Jabbari, David J. Prince, Kenneth L. Kantor, Ioannis Kanellakopoulos, Shaolin Wei
  • Patent number: 9763009
    Abstract: An electroacoustic transducer is provided that combines the properties and advantages of the known concepts of the thickness mode transducer and of the bending transducer with each other. For this purpose, an electroacoustic transducer is provided, which includes a housing and an oscillating structure. The oscillating structure is formed by at least one piezoelectric element, a diaphragm, and an acoustic transmitter. It is provided that the diaphragm is designed as a bending transducer, and the acoustic transmitter is designed as a thickness mode transducer.
    Type: Grant
    Filed: May 26, 2014
    Date of Patent: September 12, 2017
    Assignee: ROBERT BOSCH GMBH
    Inventors: David Bartylla, Andre Gerlach
  • Patent number: 9578422
    Abstract: A microphone includes a capsule module including a carrier, a primary transducer unit and a secondary transducer unit. The carrier includes a hollow part mounted to a handle unit, and first and second carrier parts extending oppositely from the hollow part. The primary transducer unit is mounted to the first carrier part, and converts sound waves and vibration into a primary electrical signal a first secondary electrical signal, respectively. The secondary transducer unit is mounted to the second carrier part, and converts the vibration into a second secondary electrical signal for counteracting the first secondary electrical signal. The secondary transducer unit includes a diaphragm disposed within an airtight space.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: February 21, 2017
    Assignee: Taiwan Carol Electronics Co., Ltd.
    Inventor: Chao-Chih Chang
  • Patent number: 9565498
    Abstract: An electromagnetic transducer for sound and ultrasound reproduction includes a substantially flat coil coupled to a diaphragm that is near to and facing the North or South side of a magnet. A very thin membrane made from a non-magnetic but electrically conductive material is independently mounted from the diaphragm and faces it. An AC signal in the coil results in diaphragm movement and “modulates” the permanent magnetic field. The modulating field generates a current in the membrane, which, upon further interactions, causes the membrane to move. The two independently moving surfaces each generate sound and result in an unusually flat SPL/frequency response, with unusually low narrow-band intensity variation and very low distortion. The transducer is also unique among electromagnetic transducers in that the force acting on the membrane is uniformly distributed over much of it, as in an electrostatic sound transducer.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: February 7, 2017
    Inventor: Jens Waale
  • Patent number: 9525947
    Abstract: The present invention discloses a piezoelectric loudspeaker. The piezoelectric loudspeaker comprises a sound producing plate, a resonant sound-box, a surround and a reflective sound-box. The sound producing plate comprises a piezoelectric ceramic element. The resonant sound-box includes a first opening comprising a first carrying part. The sound producing plate is disposed on the first carrying part. A cavity resonator is formed between the sound producing plate and the resonant sound-box. The surround is disposed between the first carrying part and the sound producing plate. The reflective sound-box includes a second opening and a reflective output opening. The second opening comprises a second carrying part. The resonant sound-box is disposed on the second carrying part. A reflective cavity body is formed between the resonant sound-box and the reflective sound-box, and the reflective cavity body is connected the reflective output opening.
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: December 20, 2016
    Assignee: MIEZO INC.
    Inventors: Yuan-Ping Liu, Chang-Heng Tsai, Kai-Wen Cheng, Chung-chun Ho
  • Patent number: 9185492
    Abstract: The systems and methods described herein relate to, among other things, a transducer capable of producing acoustic and tactile stimulation. The transducer includes a rigid mass element disposed on the diaphragm of a speaker. The mass element may optionally be removable and may have a mass selected such that the resonant frequency of the transducer falls within the range of frequencies present in an input electrical audio signal. The systems and methods advantageously benefits from both the fidelity and audio performance of a full-range speaker while simultaneously producing high-fidelity, adjustable and palpable haptic vibrations.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: November 10, 2015
    Assignee: IMMERZ, INC.
    Inventor: Shahriar S. Afshar
  • Patent number: 9060226
    Abstract: A speaker has an acoustic diaphragm, and an actuator that is driven based on a first acoustic signal. The actuator has a transmission portion that is directly or indirectly attached to the acoustic diaphragm and transmits a displacement output of the actuator to the acoustic diaphragm. The speaker also has a sounding body that is driven based on a second acoustic signal that is identical to or different from the first acoustic signal.
    Type: Grant
    Filed: August 16, 2011
    Date of Patent: June 16, 2015
    Inventors: Nobukazu Suzuki, Masaru Uryu, Yoshio Ohashi
  • Patent number: 8818009
    Abstract: A dual diaphragm dynamic type microphone transducer that, among other things, provides control of source/receiver proximity effects without sacrificing professional level dynamic microphone performance.
    Type: Grant
    Filed: October 23, 2012
    Date of Patent: August 26, 2014
    Assignee: Shure Acquisition Holdings, Inc.
    Inventors: Mark W. Gilbert, Charles S. Argento, Roger Stephen Grinnip, III
  • Patent number: 8611575
    Abstract: The disclosure relates to a concealed speaker system, specifically a system that is not readily visible in a room. The speaker system is comprised of a base frame that is adapted to be mounted between support members of a wall. The concealed speaker system further has a speaker assembly mounted to the base frame and an active member formed of PVC that has an outer surface which is substantially coplanar with the surrounding wall section, and in one form extends slightly outward therefrom. The base frame, speaker assembly, and the active member cooperate to form an acoustic chamber that is positioned behind the inner surface of the active member. Acoustic energy is transferred from the speaker assembly to the active member where the sound is produced therefrom to the room.
    Type: Grant
    Filed: November 4, 2010
    Date of Patent: December 17, 2013
    Inventor: Paul N. Hagman
  • Patent number: 8396240
    Abstract: A first electro-acoustic transducer and a second electro-acoustic transducer are supported by a housing attached to a baffle to form an asymmetric acoustical system. An equalizer receives an input signal and generates an equalized signal which is transmitted to the second electro-acoustic transducer. The equalizer is configured to generate the equalized signal such that a net mechanical force acting on the baffle, generated by the first electro-acoustic transducer in response to the input signal and by the second electro-acoustic transducer in response to the equalized signal, is less than the net mechanical force that would be generated if the equalized signal were unchanged in magnitude and equal or opposite in phase to the input signal.
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: March 12, 2013
    Assignee: Bose Corporation
    Inventor: Michael Rosen
  • Patent number: 8290198
    Abstract: A speaker device includes a pair of diaphragms disposed opposite each other, a frame configured to vibratably support an outer periphery of the diaphragms in a vibration direction, and a plurality of driving parts configured to support a rear surface of each of the diaphragms and vibrate the diaphragms in response to an audio signal. The plurality of the driving parts include a pair of magnetic circuits in which a magnetic gap is formed in a direction different from the vibration direction of the diaphragms, a pair of voice coils vibratably arranged in the magnetic gap in one axis direction, vibrating so as to move toward or away from each other in response to the audio signal, and a rigid vibration direction converter part direction-converting the vibration of the voice coils and transmitting the vibration to the diaphragms.
    Type: Grant
    Filed: March 19, 2009
    Date of Patent: October 16, 2012
    Assignees: Pioneer Corporation, Tohoku Pioneer Corporation
    Inventors: Yasuaki Ogasawara, Koji Maekawa
  • Patent number: 8235167
    Abstract: A speaker vibrating body vibrated by a driving part includes a plurality of diaphragms vibratably supported by a static part supporting said driving part and a diaphragm connecting part, provided between a first diaphragm and a second diaphragm among said plurality of diaphragms, coupling said first diaphragm and said second diaphragm and synchronously moving said first diaphragm and said second diaphragm toward or away from each other.
    Type: Grant
    Filed: December 25, 2009
    Date of Patent: August 7, 2012
    Assignees: Pioneer Corporation, Tohoku Pioneer Corporation
    Inventors: Hiroyuki Kobayashi, Toshihiro Hikichi, Takuei Nagasawa, Koji Takayama, Koji Maekawa, Kenichi Oshima, Yasuhisa Abe, Minoru Horigome
  • Patent number: 8224016
    Abstract: An object of the present invention is to provide an electroacoustic transducer having a multi-channel diaphragm, and a hearing aid using the electroacoustic transducer, in which a plurality of channels having different resonant frequencies is formed in the diaphragm using MEMS technology, thus more closely approximating the different audible frequency characteristics of respective persons. The present invention provides an electroacoustic transducer provided with a multi-channel diaphragm. The electroacoustic transducer includes a diaphragm (110) and signal conversion units (120). The diaphragm is provided with respective channels having different resonant frequencies.
    Type: Grant
    Filed: October 13, 2006
    Date of Patent: July 17, 2012
    Inventor: Ci-Moo Song
  • Patent number: 8009858
    Abstract: A loudspeaker including a frame and a toroidal magnet that is affixed to the rear of the frame. The toroidal magnet has a central passageway that opens into the frame. A cap is affixed to the rear of the magnet and closes the central passageway. A guide rod is affixed to the cap and projects forwardly from the cap into the central passageway. A tubular former is slidably positioned upon the guide rod. A voice coil is wound about, and is affixed to, the tubular former. A driver plate is affixed to the front of the tubular former. A resilient surround connects the periphery of the driver plate to the front of the frame. A suspension assembly resiliently connects the tubular former to the frame and has a pair of conical diaphragms that are secured together so as to form a bellows. A spider connects the bellows to the frame and another spider connects the bellows to the tubular former.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: August 30, 2011
    Inventor: Jason Myles Cobb
  • Patent number: 7986805
    Abstract: An acoustic diaphragm is disclosed having a plurality of acoustic elements supported by the diaphragm. In a preferred form, each element is coupled to a driver and extends radially at a uniform acute angle to a normal of the driver. In the preferred embodiment, a plural layer of the elements is arranged so that the direction of each element is out-of-phase relative to each other, preferably in the range of approximately ninety degree. An element is also supplemental to the conventional acoustic diaphragm. The improved acoustic diaphragm is used in electric acoustic and acoustic electric transducer systems having improved performance at wide frequency range.
    Type: Grant
    Filed: September 4, 2008
    Date of Patent: July 26, 2011
    Inventor: Tadashi Nagaoka
  • Patent number: 7983436
    Abstract: An apparatus for reducing baffle vibration includes a baffle that is subject to vibration. A first transducer that is seated in the baffle includes a first diaphragm that is acoustically coupled to a listening area in a vehicle and also acoustically coupled to a cavity in the vehicle. A first input signal applied to the first transducer causes the first diaphragm to move in a first direction, thereby generating an acoustic output. A second transducer is mechanically coupled to the first transducer. The second transducer includes a second diaphragm that is acoustically coupled to the first diaphragm and also acoustically coupled to the listening area. A second input signal applied to the second transducer causes the second diaphragm to move in a second direction that is substantially opposite to the first direction to reduce a vibration imparted to the baffle while substantially maintaining the acoustic output.
    Type: Grant
    Filed: April 14, 2009
    Date of Patent: July 19, 2011
    Assignee: Bose Corporation
    Inventors: George Nichols, Michael D. Rosen, Hal P. Greenberger
  • Patent number: 7970158
    Abstract: A long and narrow loudspeaker on an entire wall gives off a cylindrical wave, which covers the entire room. Extra loudspeakers fixed at an angle against the wall will be heard in another direction, producing angle stereo independent of where one is in the room. Electro-dynamic loudspeakers are made of long plates of iron with air gapes between them where magnetic fields are produced. In the air gaps are strips, which conduct the sound currents. The strips influence directly one or more membranes. The magnetic field can be produced by permanent magnets, electromagnets or through concentration of geomagnetic fields. Long loudspeakers, which use other forces such as electrostatic forces, only need to be made for small sound pressure at the membrane.
    Type: Grant
    Filed: May 25, 2005
    Date of Patent: June 28, 2011
    Inventor: Lennart Hoglund
  • Patent number: 7848533
    Abstract: A loudspeaker includes a frame and a toroidal magnet that is affixed to the rear of the frame. The toroidal magnet has a central passageway that opens into the frame. A cap is affixed to the rear of the magnet and closes the central passageway. A guide rod is affixed to the cap and projects forwardly from the cap into the central passageway. A tubular former is slidably positioned upon the guide rod. A voice coil is wound about, and is affixed to, the tubular former. A forward cone has a narrow, rear end that is affixed to the tubular former and a wide, front end that is affixed to the front of the frame. A rearward cone has a narrow, forward end with a central opening that loosely receives the rear end of the forward cone. The rearward cone also has a wide, rearward end that is affixed to the frame rearwardly of the front end of the forward cone. A forward spider is affixed to the forward end of the rearward cone and is affixed to the rear of the frame.
    Type: Grant
    Filed: November 13, 2006
    Date of Patent: December 7, 2010
    Inventor: Jason Myles Cobb
  • Patent number: 7809148
    Abstract: A loudspeaker of improved construction includes a frame and a toroidal magnet that is affixed to the rear of the frame. The toroidal magnet has a central passageway that opens into the frame. A cap is affixed to the rear of the magnet and closes the central passageway. A guide rod is affixed to the cap and projects forwardly from the cap into the central passageway. A tubular former is slidably positioned upon the guide rod. A voice coil is wound about, and is affixed to, the tubular former. A forward cone has a narrow, rear end that is affixed to the tubular former and a wide, front end that is affixed to the front of the frame. A rearward cone has a narrow, rearward end with a central opening that loosely receives the tubular former between the rear of the frame and the rear end of the forward cone. The rearward cone also has a wide, forward end that is affixed to the frame rearwardly of the front end of the forward cone.
    Type: Grant
    Filed: June 1, 2006
    Date of Patent: October 5, 2010
    Inventor: Jason Myles Cobb
  • Patent number: 7450976
    Abstract: A portable electronic device of the present invention includes a cabinet and a speaker placed inside the cabinet. The cabinet has one or more sound radiating holes in an area opposed to a front face of the speaker. A dustproof plate formed by attaching a dustproof net and a reinforcing sheet to each other is placed on the front face of the speaker or an inner face of the cabinet opposed to the front face. The reinforcing sheet has a plurality of openings formed for passing through sound waves from the speaker.
    Type: Grant
    Filed: April 27, 2005
    Date of Patent: November 11, 2008
    Assignee: Sanyo Electric Co., Ltd.
    Inventor: Toshiyuki Hoshijima
  • Patent number: 7428946
    Abstract: A suspension with a plurality of roll sections each of which has a semi-cylindrical shape from a cross-section view. The roll sections are disposed side by side based on a straight line connecting two points on an inner periphery or an outer periphery. The roll sections form a closed loop in a manner that a roll section of the roll sections being disposed first adjoins a roll section of the roll sections being disposed last. Adjacent roll sections are coupled with each other through a boundary section forming a continuous three dimensional curved surface. A linearity of compliance improves, and generation of distortion or rolling is restricted using the suspension.
    Type: Grant
    Filed: October 2, 2003
    Date of Patent: September 30, 2008
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazuki Honda, Koji Sano, Tatsuya Omori
  • Patent number: 7392880
    Abstract: A new approach has been developed to combine mid-range and high frequency sound into the throat of a horn designed for sound reinforcement. An acoustic low pass filter element is interposed between the lower frequency passage and the higher frequency passage, so that a smooth combination of the two frequency bands is achieved at the entrance to the horn bell. Thus, each frequency band has nearly identical dispersion, and the two sources have equal delay.
    Type: Grant
    Filed: March 31, 2003
    Date of Patent: July 1, 2008
    Assignee: Gibson Guitar Corp.
    Inventor: Marshall D. Buck
  • Patent number: 7360626
    Abstract: A speaker that is designed to substantially eliminate wobble of the voice coil during operation, and thus remove that source of distortion and early failure of the speaker. This is accomplished with the creation of triangular ring that extends upward from the top edge of the voice coil bobbin with that ring mating with a flat diaphragm at a right angle directly above the top edge of the bobbin. The outer edge of the diaphragm connects to the inner edge of the surround at the point where a sloping side of the “triangle” is also connected and slopes down to the top edge of the bobbin where the opposite end is connected. The outer portion of the diaphragm provides the third side of the triangle.
    Type: Grant
    Filed: August 24, 2006
    Date of Patent: April 22, 2008
    Inventor: Joseph Yaacoub Sahyoun
  • Patent number: 7292702
    Abstract: The disclosure relates to an in-wall speaker system, specifically a system that is not readily visible and mounted in a room. The in-wall speaker system is comprised of a base frame that is adapted to be mounted between support members of a wall. The in-wall speaker system further has a speaker assembly mounted to the base frame and an active member that has an outer surface which is substantially coplanar with the surrounding wall section and in one form extends slightly outward therefrom. The base frame, speaker assembly, and the active member cooperate to form an acoustic chamber that is positioned behind the inner surface of the active member. Acoustic energy is transferred from the speaker assembly to the active member where the sound is produced therefrom to the room.
    Type: Grant
    Filed: April 28, 2004
    Date of Patent: November 6, 2007
    Assignee: Dimensional Communications, Inc.
    Inventor: Paul N. Hagman
  • Patent number: 7225895
    Abstract: A speaker that is designed to substantially eliminate wobble of the voice coil during operation, and thus remove that source of distortion and early failure of the speaker. This is accomplished with the creation of triangular ring that extends upward from the top edge of the voice coil bobbin with that ring mating with a flat diaphragm at a right angle directly above the top edge of the bobbin. The outer edge of the diaphragm connects to the inner edge of the surround at the point where a sloping side of the “triangle” is also connected and slopes down to the top edge of the bobbin where the opposite end is connected. The outer portion of the diaphragm provides the third side of the triangle.
    Type: Grant
    Filed: January 8, 2004
    Date of Patent: June 5, 2007
    Inventor: Joseph Yaacoub Sahyoun
  • Patent number: 7185735
    Abstract: A speaker that is designed to substantially eliminate wobble of the voice coil during operation, and thus remove that source of distortion and early failure of the speaker. This is accomplished with the creation of triangular ring that extends upward from the top edge of the voice coil bobbin with that ring mating with a flat diaphragm at a right angle directly above the top edge of the bobbin. The outer edge of the diaphragm connects to the inner edge of the surround at the point where a sloping side of the “triangle” is also connected and slopes down to the top edge of the bobbin where the opposite end is connected. The outer portion of the diaphragm provides the third side of the triangle.
    Type: Grant
    Filed: February 19, 2004
    Date of Patent: March 6, 2007
    Inventor: Joseph Yaacoub Sahyoun
  • Patent number: 7158648
    Abstract: A loudspeaker system has an extended bass or low frequency response. The loudspeaker system integrates a passive radiator with a transducer. The loudspeaker system also mechanically isolates the passive radiator and the transducer. A support mechanism mechanically grounds vibrations or other forces from the transducer and passive radiator that may interfere or affect the operation of the loudspeaker.
    Type: Grant
    Filed: July 15, 2003
    Date of Patent: January 2, 2007
    Assignee: Harman International Industries, Incorporated
    Inventors: Aaron L. Butters, Sargam Patel
  • Patent number: 6985593
    Abstract: A vibration reducing apparatus comprising, a baffle subject to vibration, a first electroacoustical transducer characterized by a first mass seated in the baffle, a second electromechanical transducer mechanically connected to said first transducer or said baffle in the vicinity of the periphery of the first transducer. The rear sides of the diaphragms of the first and the second transducer are not connected to the listening area. The first transducer and the second transducer are constructed and arranged to receive a common electrical signal so that the movable element in the first transducer and the movable element in the second transducer move in phase opposition in response to the common electrical signal to significantly reduce the vibrating force imparted to the baffle.
    Type: Grant
    Filed: August 23, 2002
    Date of Patent: January 10, 2006
    Assignee: Bose Corporation
    Inventors: George Nichols, Amar G. Bose, Hal P. Greenberger
  • Patent number: 6920230
    Abstract: An electromagnetic transducer includes: a first diaphragm; a second diaphragm provided in a central portion of the first diaphragm, the second diaphragm comprising a magnetic material having a first opening in a central portion thereof; a yoke disposed so as to oppose the first diaphragm; a center pole disposed between the yoke and the first diaphragm, wherein the center pole has a shape which allows insertion into the first opening; a coil disposed so as to surround the center pole; and a first magnet disposed so as to surround the coil.
    Type: Grant
    Filed: April 16, 2001
    Date of Patent: July 19, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Sawako Usuki, Shuji Saiki
  • Publication number: 20040231911
    Abstract: A loudspeaker with a sealed enclosure having an active driver and a passive radiator mounted thereon is disclosed. The passive radiator is mounted essentially centrally in a passive radiator aperture and is held in place by a suspension which permits it to move in only a substantially linear direction. The enclosure and diaphragm are formed together in an injection molding process and the suspension is then co-molded between the diaphragm and enclosure. The loudspeaker has a mounting bracket that permits it be locked in a selected rotated position relative to the bracket. The active driver may be provided with a reflector to produce an omni-polar, or omni-directional, sound pattern.
    Type: Application
    Filed: April 5, 2004
    Publication date: November 25, 2004
    Inventors: Andrew C. Welker, John Tchilinguirian
  • Patent number: 6814181
    Abstract: There is provided an electrically conductive damper device for a speaker in which local bending is reduced and break-downs of material of the damper and metallic wires incorporated in the damper are prevented, by additionally providing one or more sheets of damper fabric as a reinforcing damper 142 and by bonding it to a main damper 141 by way of various kinds of resin, in order to reinforce a neck portion of the electrically conductive damper. Further, properties of the damper can be adjusted by varying an outer diameter of the reinforcing damper 142, or by selecting the resin to be employed as an adhesive.
    Type: Grant
    Filed: October 22, 2001
    Date of Patent: November 9, 2004
    Assignees: Pioneer Corporation, Tohoku Pioneer Corporation
    Inventors: Yasuhisa Abe, Koji Matsumoto, Koji Takayama, Hiroyuki Tomiyama
  • Patent number: 6782112
    Abstract: An acoustical transducer enclosure has an acoustic lever acoustically coupled to an electro-acoustical transducer so as to force all radiated sound through the lever.
    Type: Grant
    Filed: March 16, 2000
    Date of Patent: August 24, 2004
    Inventor: Earl R. Geddes
  • Patent number: 6766027
    Abstract: An elliptical speaker system is provided for in-wall/in-ceiling mounting. The speaker system comprises an elliptical speaker frame or bracket defining a speaker front plane having a generally arcuate inner surface. First and second speaker components are mounted within the speaker frame, on opposing sides of the speaker inner surface. At least one of the speaker components may be translatable within the speaker frame.
    Type: Grant
    Filed: October 31, 2002
    Date of Patent: July 20, 2004
    Assignee: Dana Innovations
    Inventors: Todd Ryan, Ray Call, Tommy Rucci
  • Patent number: 6672423
    Abstract: In a speaker including a voice coil which is wound on a voice coil bobbin and is inserted into a magnetic circuit gap of a magnetic circuit, and a cone which is coupled to the voice coil bobbin for vibration, the cone (16) is constructed of two divided cones: a drive cone (16A) linked to the voice coil bobbin (14) and a cone paper (16B) linked through an edge (17) to a frame (F).
    Type: Grant
    Filed: July 24, 2001
    Date of Patent: January 6, 2004
    Assignees: Pioneer Corporation, Tohoku Pioneer Corporation
    Inventor: Toshifumi Kato
  • Patent number: 6627805
    Abstract: For musical instruments or sound reproduction, finer sound definition is preferable. In sound reproduction, electro-acoustic transducers fitted with round membranes or electrostatic system stripes are common. No system states that the sound created is correct for the human ear. The present method concerns a fractal shape responding to criteria of the human ear shape. A membrane which, like the ear via its shape, is a set of resonators with different frequencies. The membrane shape, known as a harmony amplifier, has independent tongues emitting from a given surface, like fingers of a hand coming out of the palm. A membrane can be put into digital form by tongues. The membrane is placed in a musical instrument. Another variant is a membrane mounted on a sound frequency generator constituting an electro-acoustic transducer. This is effective for all types of musical instruments and particularly for audio and audio-visual applications.
    Type: Grant
    Filed: April 23, 2001
    Date of Patent: September 30, 2003
    Assignee: Pica-Sound International
    Inventors: Marc Charbonneaux, Patrice Morchain, Pierre Piccaluga, Claude-Annie Perrichon
  • Patent number: 6578661
    Abstract: A speaker apparatus which can remove undesirable vibrations and can produce sounds of excellent quality of acoustic signals having high audio frequencies is presented by increasing a strength of a flat joint portion and by properly setting a mass ratio between a central dome-like diaphragm and an edge-like diaphragm of a speaker diaphragm. This speaker apparatus includes a diaphragm portion in which a mass ratio of the edge-like diaphragm relative to the dome-like diaphragm falls within a predetermined range near 1 and a fixed portion at which a bobbin of a voice coil or an end face of a conductive one turn ring is bonded to and fixed to a flat portion for joining the dome-like diaphragm and the edge-like diaphragm so that mechanical strength of a joint flat portion of the diaphragms can be increased.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: June 17, 2003
    Assignee: Sony Corporation
    Inventors: Yoshio Ohashi, Masaru Uryu
  • Patent number: 6513623
    Abstract: A frame (14) supporting a diaphragm (12) by its outer periphery is constructed by a connecting ring (30) and a base (28) which comprises a bottomed cylinder portion (28A) and a mounting portion (28B) which extends radially outward from the bottomed cylinder portion (28A) which is a part of the magnetic circuit unit (18). The connection is achieved by the caulking of the ring (30) and the mounting portion (28B) with the diaphragm (12) clamped therebetween.
    Type: Grant
    Filed: April 4, 2001
    Date of Patent: February 4, 2003
    Assignee: Star Micronics Co., Ltd.
    Inventors: Shigeru Sugiyama, Hajime Kitamura, Naohiro Fujinami, Yoshio Imahori, Hitoshi Yamashima
  • Patent number: 6460651
    Abstract: A passive radiator and method is disclosed which improves frequency response linearity and greatly reduces the possibility that wobble of a passive radiator which will occur without the displacement limitations of a spider containing speaker structure. Two substantially fiat surfaced speaker diaphragms are tied together and supported by two sets of surrounds oriented in opposite directions to reduce the non-linearity in the surround spring rate Hand improve low frequency sound generation. A vent (pressure relief system is provided to improve the frequency response and range of motion of the passive speaker system. A progressive surround roll arrangement provides for improved sound quality by utilizing localized position based extension while maintaining the range of maximum travel during resonance.
    Type: Grant
    Filed: April 4, 2000
    Date of Patent: October 8, 2002
    Inventor: Joseph Yaacoub Sahyoun
  • Patent number: 6454046
    Abstract: Synchronous dustproof cover structure for sound membrane. The dustproof cover structure being made of a light and rigid material. Multiple reinforcing ribs are perpendicularly disposed on one face of the dustproof cover at equal intervals. Bottom ends of the multiple reinforcing ribs are connected with adjoining sections of the sound basin and the sound ring. The circumference of the dustproof body is connected on the sound basin, whereby the dustproof cover, the sound basin and the sound ring are connected into an integral body and the sound basin and the dustproof cover are synchronously vibrated with the sound ring to emit sound. The multiple reinforcing ribs are connected with the sound basin and the sound ring at multiple points so as to enhance the rigidity and strength of the sound basin. Therefore, the distortion of the sound basin at high volume can be reduced and a good quality of sound can be achieved.
    Type: Grant
    Filed: October 27, 2000
    Date of Patent: September 24, 2002
    Inventor: Po-An Chuang
  • Patent number: 6431309
    Abstract: A speaker system with a dual cone speaker having interconnected primary speaker and secondary speaker cones. An enclosure defines a first sub-chamber for interacting with the rear of the first speaker cone and a second sub-chamber for interacting with the rear of the second speaker cone. The sub-chambers may be sealed sub-chambers, ported sub-chambers or acoustic waveguides.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: August 13, 2002
    Inventor: C. Ronald Coffin
  • Patent number: 6343128
    Abstract: A dual-cone loudspeaker includes a primary speaker cone and an axially displaced secondary speaker cone mounted to the back of a magnet structure. A rigid link causes both cones to move in unison. The rigid link includes an open support structure with equiangularly extending spokes that form a central hub. A ring circumscribes the spokes and ataches to the first speaker cone. A rigid element connects to the spokes and the secondary speaker cone so the primary and secondary speaker cones move in unison and improve the bass response for the loudspeaker. The rigid coupling device is also adapted to support a high frequency radiator to extend the overall loudspeaker frequency response into higher frequencies.
    Type: Grant
    Filed: February 17, 1999
    Date of Patent: January 29, 2002
    Inventor: C. Ronald Coffin
  • Patent number: 6188774
    Abstract: A flat loudspeaker of superior quality for use in audio appliances, in which loudspeaker the generation of abnormal sounds is eliminated by placing a voice coil with a high accuracy in the magnetic gap. A diaphragm is split into a main diaphragm (11) and a sub-diaphragm (12); a voice coil (8) is connected to the inner circumference of the main diaphragm (11) whose inner diameter is substantially identical with the diameter of the magnetic gap (5). In the loudspeaker, the voice coil (8) is placed in a right positioning without inclination and eccentricity relative to the magnetic gap (5), abnormal sounds are eliminated, and a thinner configuration and a lower rejection rate are made compatible.
    Type: Grant
    Filed: July 13, 1999
    Date of Patent: February 13, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takashi Sabato, Kazuhiro Oshika
  • Patent number: 6026929
    Abstract: The present invention is directed to an improved high frequency acoustic speaker center cone, which may be located at a speaker coil tubular support, tube wherein the cone has a plurality of thin, pie-shaped segments radiating outwardly with each of the segments having an arcuated cross-section, so as to create a convex shape towards its center. The segments are highly concave toward the center and less concave with increasing radial distance away from the center. The width of the segments may increase linearly with radial distance so as to create a constant acoustical resistance radially. The center cone also has a thickness gradient with increasing thickness radially towards its center. In another embodiment, the present invention is directed to a system containing both the aforesaid center cone, an outer cone with similar radial characteristics but being concave towards its center. The segments of the outer cone preferably terminate at a flexible, high sound absorption ring.
    Type: Grant
    Filed: October 8, 1998
    Date of Patent: February 22, 2000
    Assignee: Single Source Technology and Development, Inc.
    Inventor: Alexander Faraone
  • Patent number: 5880412
    Abstract: The present invention is directed to an improved high frequency acoustic speaker center cone, which may be located at a speaker coil tubular support, tube wherein the cone has a plurality of thin, pie-shaped segments radiating outwardly with each of the segments having an arcuated cross-section, so as to create a convex shape towards its center. The segments are highly concave toward the center and less concave with increasing radial distance away from the center. The width of the segments may increase linearly with radial distance so as to create a constant acoustical resistance radially. In another embodiment, the present invention is directed to a system containing both the aforesaid center cone, an outer cone with similar radial characteristics but being concave towards its center. The segments of the outer cone preferably terminate at a flexible, high sound absorption ring. The center cone fits within an orifice at the center of the outer cone.
    Type: Grant
    Filed: November 10, 1997
    Date of Patent: March 9, 1999
    Inventor: Alexander Faraone