Critically Defined Material Or Coating Patents (Class 181/167)
  • Patent number: 10468012
    Abstract: A compressed skins-tensioned core structure includes a first surface region; a second surface region; a core between the first surface region and the second surface region; a first transition region continuous with the first surface region at a side, and continuous with the core at another side; and a second transition region continuous with the core at a side, and continuous with the second surface region at another side, wherein each of the first surface region, the second surface region, the core, the first transition region and the second transition region is formed of a substantially homogeneous amorphous material; each of the first surface region and the second surface region exhibits an internal compressive stress, the core exhibits an internal tensile stress, and each of the first transition region and the second transition region exhibits a stress gradient from the internal compressive stress to the internal tensile stress.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: November 5, 2019
    Assignee: BDNC (HOLDING) LIMITED
    Inventor: Walter Ka Wai Chu
  • Patent number: 10448182
    Abstract: The present disclosure discloses a method for forming a silica gel diaphragm and a silica gel diaphragm prepared using the method. The method for forming a silica gel diaphragm includes at least the following steps: step S1: providing a hot pressing mold, and placing at least a dome as an embedment into the hot pressing mold; step S2: injecting liquid silica gel into the hot pressing mold; and step S3: molding the liquid silica gel via hot pressing so as to obtain a silica gel membrane which is at least connected with the dome. The method for forming a silica gel diaphragm provided by the present disclosure is easy to conduct and the formed silica gel diaphragm has good performance.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: October 15, 2019
    Assignee: AAC Technologies Pte. Ltd.
    Inventors: BingKe Zhu, KaiYan Gao
  • Patent number: 10393155
    Abstract: Wavy riblets are disposed at one or more auditorily important acoustical boundary layers of a sound producing device. Wavy riblets can be deployed directly onto the surface of the device, and/or onto a film or other carrier that is then positioned in or on the device. Wavy riblets can be advantageously deployed in sets, in a herringbone pattern, and sets of smaller riblets can be disposed between sets of larger riblets. Wavy riblets can also be superimposed onto other wavy or non-wavy riblets. Contemplated sound producing devices include speakers, musical instruments, fan blades and ducts.
    Type: Grant
    Filed: August 20, 2018
    Date of Patent: August 27, 2019
    Assignee: OUT OF THE BOX AUDIO, LLC
    Inventor: Douglas K. Pauley
  • Patent number: 10390141
    Abstract: A loudspeaker diaphragm (12) comprising a woven fiber body supports damping material (25), for example PVA polymer, on a rearward-facing surface (24). The woven fiber body may be formed of lengths (14) non-metallic fiber material (for example glass fiber) coating with a thin metal coating (32). The mass of the layer of damping material (25) may be significantly greater than the mass of the woven fiber body. An attractive sparkly looking loudspeaker diaphragm (12) may thus be provided which damps undesirable vibration while providing a flatter frequency-response curve (50).
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: August 20, 2019
    Assignee: Eva Automation, Inc.
    Inventors: Thomas O'Brien, Martial André Robert Rousseau
  • Patent number: 10327074
    Abstract: Disclosed is a vibrating film comprising a vibrating film body, wherein the vibrating film body comprises a central plane part and a peripheral fixing part. A Dome reinforcing part is arranged on the plane part, a first thermosetting adhesive layer is provided between the plane part and the Dome reinforcing part, and the plane part and the Dome reinforcing part are adhered together by thermosetting through the first thermosetting adhesive layer. Further disclosed is an assembling process for the vibrating film.
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: June 18, 2019
    Assignee: GOERTEK, INC.
    Inventors: Hui Wang, Xiang Guo
  • Patent number: 10291997
    Abstract: Disclosed is a speaker device, comprising a vibration system, a magnetic circuit system, and an auxiliary system for accommodating and fixing the vibration system and the magnetic circuit system. The vibration system comprises a diaphragm, the auxiliary system comprises a front cover, a side of the front cover is provided a waterproof pad, said side being away from the vibration system. The diaphragm are bonded to the front cover and the waterproof pad by integrally injection molding. The speaker device of the present invention satisfies terminal waterproof requirements for IPX7 and above, and has a good waterproof effect. Besides, a production process of the waterproof speaker device is simplified, production efficiency is increased, production costs of the speaker device are decreased, and the reprocessed product yield of the speaker device is increased.
    Type: Grant
    Filed: November 16, 2015
    Date of Patent: May 14, 2019
    Assignee: GOERTEK INC.
    Inventors: Xiaodong Cai, Guodong Zhao
  • Patent number: 10255901
    Abstract: An acoustic lens or diffractive acoustic device, including but not limited to, a sub-wavelength thickness lens or diffuser, comprising an array of Helmholtz resonators (HRs) that provide perfect or near-perfect sound transmission through a rigid barrier. HRs are arranged in a line or an array confined within a waveguide and oriented so that one neck protrudes onto each side of the barrier. Extraordinary acoustic transmission (EAT) occurs when radiation (such as EM or acoustic radiation) incident on the barrier perforated with sub-wavelength holes is transmitted at a rate higher than expected based on the areal coverage fraction of the holes. Transmission is independent of the direction of sound on the barrier and the relative placement of the necks.
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: April 9, 2019
    Inventor: William M. Robertson
  • Patent number: 10097925
    Abstract: The present disclosure disclose a diaphragm dome, the diaphragm dome includes a first carbon fiber layer and a second carbon fiber layer which are alternatively arranged by stacking, the first carbon fiber layer and the second carbon fiber layer are respectively a single-layer structure formed by an one-way extended carbon fiber bundle, an extending direction of the carbon fiber bundle of the first carbon fiber layer is perpendicular to an extending direction of the carbon fiber bundle of the second carbon fiber layer, and a thickness difference exists between the first carbon fiber layer and the second carbon fiber layer. In the diaphragm dome provided by the present disclosure, the material has larger specific strength, thus can reduce the thickness of the diaphragm dome, the carbon fiber layers of the diaphragm dome are well adhered, which is not readily layered, and has good water resistance.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: October 9, 2018
    Assignee: AAC TECHNOLOGIES PTE. LTD.
    Inventors: Xun Di, Lipeng Ma, Ping Liang, Bin Zhao, Xudong Yan
  • Patent number: 10057701
    Abstract: A method for manufacturing a loudspeaker includes creating a dual-layered fabric having an acoustic resistance by attaching a first fabric having a first acoustic resistance to a second fabric having a second acoustic resistance lower than the first acoustic resistance. The method further includes applying a coating material to a first portion of the dual-layered fabric. The coating material forms a pattern on the first portion of the dual-layered fabric that changes the acoustic resistance of the dual-layered fabric along at least one of: a length and radius of the dual-layered fabric.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: August 21, 2018
    Assignee: Bose Corporation
    Inventors: Joseph Jankovsky, Joseph A. Coffey, Jr., Brendan J. Finnegan
  • Patent number: 9992596
    Abstract: Acoustic transducer systems are described herein and in particular, acoustic transducer systems involving high displacement are described. An example acoustic transducer system includes an acoustic driver, a diaphragm position sensing module for generating a position signal corresponding to a displacement of a diaphragm of the acoustic driver, and a controller operable to: receive an input audio signal; generate a control signal based at least on the input audio signal and the position signal; and transmit the control signal to a voice coil operably coupled to the diaphragm so that the voice coil moves within an air gap within the acoustic driver at least partially in response to the control signal. A height of the voice coil can correspond substantially to a gap height in some embodiments.
    Type: Grant
    Filed: November 27, 2015
    Date of Patent: June 5, 2018
    Assignee: AUDERA ACOUSTICS INC.
    Inventors: David Russell, John French
  • Patent number: 9973856
    Abstract: An ultrathin electromagnetic vibrating device and its manufacturing method, wherein the ultrathin electromagnetic vibrating device includes: a base frame, a vibrating reed, a set of surrounds, a voice coil and a magnetic circuit system, wherein the surrounds include an upper surround and a lower surround, respectively connected with an upper surface and a lower surface of the vibrating reed to fixedly connecting the vibrating reed with a base of the base frame. Due to an application of the lower surround to form a combined action of the upper and lower surround, the vibrating reed is only able to keep vibrating up and down vertically, a first end of the voice coil is fixedly provided on the lower surface of the vibrating reed, similarly, while a stroke of the voice coil drives the vibrating reed to vibrate up and down vertically, the voice coil achieves an up-and-down vertical stroke.
    Type: Grant
    Filed: April 12, 2012
    Date of Patent: May 15, 2018
    Inventor: Xinmin Huang
  • Patent number: 9875733
    Abstract: The technology described herein generally relates to a microporous membrane laminate for acoustic venting. In one embodiment, the technology disclosed herein is a polytetrafluoroethylene (PTFE) membrane having an average pore size between 0.05 ?m and 2 ?m and a scrim layer laminated to the PTFE membrane to form an acoustic membrane laminate. The acoustic membrane laminate has a thickness between 10 ?m and 60 ?m, and the scrim layer defines an average scrim opening between 0.20 mm2 and 5.0 mm2. The acoustic membrane laminate exhibits an increased average insertion loss in a frequency range from 300 Hz to 3000 Hz compared to the PTFE membrane alone, and has a decreased total harmonic distortion relative to the PTFE membrane alone. The acoustic membrane laminate has a water entry pressure that is substantially equal to that of the PTFE membrane.
    Type: Grant
    Filed: October 14, 2014
    Date of Patent: January 23, 2018
    Assignee: Donaldson Company, Inc.
    Inventor: Jacob Sanders
  • Patent number: 9877094
    Abstract: Provides is a waterproof sound-permeable membrane (10) adapted to permit passage of sound and prevent entry of water. The waterproof sound-permeable membrane (10) includes a sound-permeation region (11) having a polytetrafluoroethylene (PTFE) membrane (20). The polytetrafluoroethylene membrane (20) has an average pore diameter of 0.02 ?m or more and 0.1 ?m or less as measured according to ASTM F316-86 and has a porosity of 5% or more and 25% or less. The waterproof sound-permeable membrane (10) is suitable for application to an electronic device containing an acoustic device.
    Type: Grant
    Filed: October 28, 2014
    Date of Patent: January 23, 2018
    Assignee: NITTO DENKO CORPORATION
    Inventors: Masaaki Mori, Toshimitsu Tachibana
  • Patent number: 9854365
    Abstract: A loudspeaker includes a voice coil in a balanced state. In the loudspeaker, at least a first suspension element acts on a first side of the voice coil, and at least a second suspension element acts on a second side of the voice coil. The loudspeaker includes a symmetric magnet assembly. The voice coil aligns with the symmetric magnet assembly. The symmetric alignment contributes to the loudspeaker yielding substantially symmetric motor force (BL), suspension stiffness (K), and inductance (Le).
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: December 26, 2017
    Assignee: Harman International Industries, Inc.
    Inventor: Brian Sterling
  • Patent number: 9818395
    Abstract: An acoustic diaphragm which has excellent Young's modulus and internal loss (tan ?) values is provided. The acoustic diaphragm according to the present invention is made from papermaking material substantially solely including cellulose nanofibers. In one embodiment, the cellulose nanofibers are unoxidized cellulose nanofibers.
    Type: Grant
    Filed: November 2, 2016
    Date of Patent: November 14, 2017
    Assignee: Onkyo Corporation
    Inventors: Hiroyasu Kumo, Takaya Fujii
  • Patent number: 9774972
    Abstract: The present invention relates to a loudspeaker 1 including a cone 20 having a central aperture with a cone collar 28 upstanding from the perimeter of the central aperture 26 of the cone, a spider 30 having a central aperture 36, the spider having a collar 38 upstanding from the perimeter of the central aperture of the spider, and a voice coil former 40. The collar of each of the cone and the spider are concentrically located around an end region of the voice coil former to form an elongate neck region 12. The use of the elongate neck region allows for the cone, spider and voice coil former to be joined more easily therefore forming a more reliable and durable join.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: September 26, 2017
    Assignee: PSS Belgium, N.V.
    Inventors: Onur Ilkorur, David Corynen, Edgard Diaz Valencia
  • Patent number: 9769570
    Abstract: An acoustic diaphragm made at least in part from an expanded material. The expanded material includes one or more of cellulose, synthetic fibers and glass fibers. The expanded material has more than about 55% by volume voids.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: September 19, 2017
    Assignee: Bose Corporation
    Inventors: Agota F. Fehervari, Shawn Prevoir, Wit Bushko
  • Patent number: 9716950
    Abstract: The diaphragm has a paper base layer and a papermaking layer. The papermaking layer is formed on a surface of the paper base layer. The paper base layer contains natural fibers and thermoplastic resin, and is formed by a papermaking process with a mixture of the natural fibers and the resin. The papermaking layer, contains fibers each having a tensile elastic modulus of 150 GPa or greater, and is formed by a papermaking process with the fibers.
    Type: Grant
    Filed: October 6, 2014
    Date of Patent: July 25, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yoshimichi Kajihara, Yohei Jin
  • Patent number: 9640171
    Abstract: An acoustic lens or diffractive acoustic device, including but not limited to, a sub-wavelength thickness lens or diffuser, comprising an array of Helmholtz resonators (HRs) that provide perfect or near-perfect sound transmission through a rigid barrier. HRs are arranged in a line or an array confined within a waveguide and oriented so that one neck protrudes onto each side of the barrier. Extraordinary acoustic transmission (EAT) occurs when radiation (such as EM or acoustic radiation) incident on the barrier perforated with sub-wavelength holes is transmitted at a rate higher than expected based on the areal coverage fraction of the holes. Transmission is independent of the direction of sound on the barrier and the relative placement of the necks.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: May 2, 2017
    Inventor: William M. Robertson
  • Patent number: 9635464
    Abstract: A membrane and a method for producing a diaphragm, and a composite diaphragm are provided. The MCPET material is a MCPET baffle with micropores independent from each other; wherein an average size of the micropore is smaller than or equal to 5 ?m, a foaming rate of the MCPET baffle is less than 2 times, and a density of the MCPET baffle is less than 300 kg/m3. The MCPET baffle is further processed by means of layered cut to form the membrane that is thinner than the MCPET baffle. At least one surface with micropores is exposed to form a micropore exposed surface. The membrane is heated under a temperature of 130-140° C. to form the diaphragm. The composite diaphragm includes a main diaphragm and an auxiliary diaphragm, wherein the main diaphragm is made of the membrane of the present application. The diaphragm made of the membrane has a superior sound performance.
    Type: Grant
    Filed: May 1, 2014
    Date of Patent: April 25, 2017
    Assignees: TRUE HONEST COMPANY LIMITED, FURUKAWA ELECTRIC HONG KONG LIMITED
    Inventors: Muk Chung Roger So, Mugino Eddie Akira
  • Patent number: 9521490
    Abstract: A diaphragm can be obtained which exhibits large internal loss and Young's modulus and which can be produced efficiently. A speaker diaphragm 1 comprises at least one layer 1A formed by molding a component member configured by a fiber and a tangled fiber body of a synthetic fiber. The synthetic fiber is a polyvinyl alcohol fiber having boron.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: December 13, 2016
    Assignees: Pioneer Corporation, Tohoku Pioneer Corporation, Mogami Denki Corporation
    Inventors: Kazuharu Kawata, Yoshihiro Sato, Hideki Takahashi
  • Patent number: 9426549
    Abstract: An exciter assembly for use with a flat panel loudspeaker system including a panel having a core, an inner sheet coupled to an inner surface of the core and an outer sheet coupled to an outer surface of the core. The exciter assembly may include an exciter having a voice coil assembly attachable to the outer sheet of the panel, the voice coil assembly having a lock pad, and a lock base releasably engaging the lock pad and attachable to the outer sheet of the panel, to vibrate the panel to generate sound energy; and an exciter support bracket connected to the exciter housing and attachable to the outer sheet of the panel.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: August 23, 2016
    Assignee: THE BOEING COMPANY
    Inventor: Wing W. Cheung
  • Patent number: 9204221
    Abstract: An acoustic metal diaphragm comprises a diaphragm base made of an organic material and a metal-plated layer. The diaphragm base has a smooth surface. The metal-plated layer is adhered to the smooth surface of the diaphragm base by an intermediate layer. The intermediate layer is disposed between the diaphragm base and the metal-plated layer. The metal-plated layer is made of pure beryllium or a beryllium alloy. Accordingly, the diaphragm base is made of the organic material and provided with a smooth surface. The intermediate layer allows the metal-plated layer to be adhered to the smooth surface more firmly. Using the pure beryllium or beryllium alloy to manufacture the metal-plated layer increases the rigidity of the diaphragm base and maintains the softness thereof to slow down the attenuation of the bandwidth, attain a wider frequency band, solve the problem of the high frequency and increase the quality of the sound.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: December 1, 2015
    Assignees: TRANSOUND ELECTRONICS CO., LTD.
    Inventor: Tsengfeng Wen
  • Patent number: 9027699
    Abstract: A speaker diaphragm contains a material obtained by adding a cycloolefin polymer resin to a carbon fiber-reinforced liquid crystal polymer. The speaker diaphragm having high sound velocity, a speaker, and a production method of the speaker diaphragm can thereby be obtained.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: May 12, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tetsuo Mitani, Osamu Murakami, Masashi Hara, Akihiro Fujita
  • Patent number: 9002041
    Abstract: A process for the manufacture of a speaker cover comprises loading the speaker cover into a plasma chamber, introducing a fluoro monomer into the plasma chamber, pulsing plasma for processing, removing any excess monomer gas from the plasma chamber, and removing the speaker cover from the plasma chamber.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: April 7, 2015
    Assignee: Logitech Europe S.A.
    Inventors: Steve McGarry, Joy E. Lyons, Jeff Anderson, Timothy Valentine
  • Patent number: 8991548
    Abstract: A suspension element for mechanically coupling an acoustic diaphragm to a stationary element. The suspension element is characterized by a total compliance. The total compliance includes a shear compliance and a beam compliance. The beam compliance is not significantly larger than the shear compliance.
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: March 31, 2015
    Assignee: Bose Corporation
    Inventor: Jason D. Silver
  • Patent number: 8950545
    Abstract: The present disclosure provides a compound membrane and an acoustic device including such a compound membrane. The compound membrane includes a polyarylate film, and a thermoplastic polyurethane elastomer attached to one surface of the polyarylate film.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: February 10, 2015
    Assignees: AAC Acoustic Technologies (Shenzhen) Co., Ltd., American Audio Component (Shenzhen) Co., Ltd.
    Inventors: Xing-Zhi Huang, Jing He
  • Patent number: 8942407
    Abstract: A loudspeaker radiating diaphragm can be stiffened to help increase the breakup frequency to above the working frequency range of the driver concerned, by forming it of a molded part and an attached formed part. The molded part is a radiating surface with stiffening ribs. The formed part is a thin surface of high modulus material, attached to the rear of the ribs. The overall structure can have significantly higher stiffness than either of the two parts. This helps in designing a loudspeaker driver that does not breakup within its working frequency range.
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: January 27, 2015
    Assignee: GP Acoustics (UK) Limited
    Inventors: Mark Alexander Dodd, Jack Anthony Oclee-Brown, Julia Davidson
  • Publication number: 20150016657
    Abstract: A diaphragm and a sounder using the same are disclosed in the present disclosure. The diaphragm includes a suspension portion and a dome assembled with the suspension portion. The dome includes a polyethylene terephthalate (PET) layer, a middle layer and an adhesive layer, with the middle layer sandwiched between the PET layer and the adhesive layer. The middle layer is formed with a first through hole for adjusting the deformation amount of the diaphragm. The present disclosure can improve the flatness of the dome and prevent deformation of the dome after the vibration.
    Type: Application
    Filed: January 24, 2014
    Publication date: January 15, 2015
    Applicants: AAC MICROTECH (CHANGZHOU) CO., LTD., AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) CO., LTD.
    Inventors: Wei Song, Chunmei She
  • Patent number: 8925674
    Abstract: A canalphone system may include a high audio driver carried by a canalphone housing, and a low audio driver carried by the canalphone housing adjacent to the high audio driver. The system may also include an acoustical-timer to phase correct a high audio signal from the high audio driver directed to the outside of the canalphone housing with delivery of a low audio signal from the low audio driver directed to the outside of the canalphone housing.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: January 6, 2015
    Inventor: Jerry Harvey
  • Patent number: 8925675
    Abstract: The present disclosure provides a compound membrane and an acoustic device including such a compound membrane. The compound membrane includes a polyetherimide film, and a thermoplastic polyurethance elastomer attached to one surface of the polyetherimide film.
    Type: Grant
    Filed: September 23, 2013
    Date of Patent: January 6, 2015
    Assignees: AAC Acoustic Technologies (Shenzhen) Co., Ltd., American Audio Components (Shenzhen) Co., Ltd.
    Inventors: Xing-Zhi Huang, Jing He
  • Patent number: 8873793
    Abstract: A loudspeaker resin molding component includes resin and bamboo fibers refined to have a microfibril status and carbonized. By this configuration, such a loudspeaker resin molding component can achieve both of a high elastic modulus and a large internal loss.
    Type: Grant
    Filed: July 19, 2013
    Date of Patent: October 28, 2014
    Assignee: Panasonic Corporation
    Inventors: Yohei Jin, Yoshimich Kajihara, Toru Fujii
  • Patent number: 8863890
    Abstract: The invention relates to a speaker dome comprising: a polycrystalline diamond dome body formed of a material of high stiffness with a Young's modulus greater than 50 GPa and having respective inner and outer surfaces; and a coating on at least one side of the dome body, wherein the coating comprises an optically refractive metal compound layer which is semi-transparent and which forms one or more colors via interference of reflected light from front and rear surfaces of the layer. The invention also relates to a diamond component comprising: a diamond body; and a coating on at least one side of the diamond body, wherein the coating comprises at least two layers including a first layer bonded to the at least one side of the diamond body and a second layer disposed over the first layer, the second layer being an optically refractive metal compound coating which is semi-transparent and which forms one or more colors via interference of reflected light from front and rear surfaces of the second layer.
    Type: Grant
    Filed: February 7, 2012
    Date of Patent: October 21, 2014
    Assignee: Element Six Limited
    Inventors: Paul Nicholas Inglis, John Robert Brandon, Neil Perkins
  • Patent number: 8855357
    Abstract: A diaphragm is formed of paper manufactured from a first fiber material and a second fiber material. The first fiber material is beaten to have a given freeness, and the second fiber material is made by carbonizing bamboo fiber that has been fibrillated into a microfibril state. This structure allows the second fiber material to increase a rigidity of the diaphragm and also increase an internal loss, so that sound quality of the speaker that employs this diaphragm can be improved.
    Type: Grant
    Filed: January 12, 2011
    Date of Patent: October 7, 2014
    Assignee: Panasonic Corporation
    Inventors: Yoshimichi Kajihara, Yohei Jin, Toru Fujii
  • Patent number: 8851228
    Abstract: A speaker diaphragm structure includes a speaker diaphragm and a coating formed on the speaker diaphragm and is composed of at least one dense layer and relatively porous layer alternately arranged with respect to the at least one dense layer.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: October 7, 2014
    Assignee: Feng Chia University
    Inventors: Ju-Liang He, Po-Yu Chen
  • Patent number: 8831269
    Abstract: A bobbin includes a stratiform composite structure. The stratiform composite structure includes an amorphous carbon structure and a carbon nanotube film structure composited with the amorphous carbon structure. The amorphous carbon structure and the carbon nanotube film structure are combined by van der Waals attractive force and covalent bonds therebetween.
    Type: Grant
    Filed: July 15, 2013
    Date of Patent: September 9, 2014
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Liang Liu, Jia-Ping Wang
  • Patent number: 8798310
    Abstract: The present disclosure relates to a diaphragm that may be used with a mechanical-to-acoustical transducer. The diaphragm may include a layer of optically clear film, a damping layer and another layer of optically clear film. The damping layer may be an adhesive. The diaphragm may also comprise two optically clear films, optionally including a damping layer, wherein the films indicate a desired coefficient of linear thermal expansion in one or both of the machine and transverse directions.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: August 5, 2014
    Assignee: Emo Labs, Inc.
    Inventors: Jeffrey Davis Booth, Stefan Bokaemper, Robert H. White, Jr.
  • Patent number: 8774449
    Abstract: Each of a speaker diaphragm, a dust cap, and a frame includes a resin and a plant opal that is extracted from a bamboo leaf, and is formed by injection molding or sheet molding. The configuration can enhance stiffness of each of the diaphragm, the dust cap, and the frame and implement high performance.
    Type: Grant
    Filed: December 24, 2010
    Date of Patent: July 8, 2014
    Assignee: Panasonic Corporation
    Inventors: Yoshimichi Kajihara, Yohei Jin, Toru Fujii
  • Patent number: 8755557
    Abstract: A loudspeaker diaphragm according to an embodiment of the present invention includes: a diaphragm portion; and an edge portion, which is molded integrally with the diaphragm portion and made of a material different from a material for the diaphragm portion, wherein: the diaphragm portion includes, at an outer peripheral end thereof, an outer wall portion provided upright in a direction substantially parallel to a vibrating direction of the diaphragm portion; an inner peripheral surface of the edge portion is bonded onto an outer peripheral surface of the outer wall portion; and the outer wall portion has a height larger than a thickness of the diaphragm portion.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: June 17, 2014
    Assignee: Onkyo Corporation
    Inventors: Takeshi Fujitani, Yushi Ono, Ryoichi Takahashi, Ryosuke Sano
  • Patent number: 8718317
    Abstract: An electromagnetic device includes a housing, a planar coil disposed inside the housing, and a magnetic diaphragm disposed inside the housing, wherein the plane of the planar coil is substantially in parallel with the plane of the magnetic diaphragm, wherein the planar coil is separated from the magnetic diaphragm, and wherein the magnetic diaphragm is moveable in the presence of an exterior pressure.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: May 6, 2014
    Inventor: Zonghan Wu
  • Patent number: 8695753
    Abstract: A diaphragm for a loudspeaker including a plurality of masses, each mass being substantially the same radial distance from the center of the diaphragm, the plurality of masses being divided into two arrays, each array including one or more individual masses, wherein, in use, at a selected frequency, the pair of arrays act to produce a dominant bending moment, and, the center of the diaphragm lies substantially on the axis of the dominant bending moment, wherein, the dominant bending moment is the bending moment produced by the combination of masses which has the greatest magnitude, if they produce more than one bending moment.
    Type: Grant
    Filed: February 21, 2011
    Date of Patent: April 15, 2014
    Assignee: PSS Belgium NV
    Inventors: Karel Goossens, Onur Ilkorur, David Corynen, Charalampos Ferekidis, Karl-Heinz Fink
  • Patent number: 8695812
    Abstract: A water-proof sound-transmitting membrane 10 includes a polytetrafluoroethylene porous membrane 1 and has a surface density of 1 to 20 g/m2. The polytetrafluoroethylene porous membrane 1 includes a first porous layer 1a, and a second porous layer 1b stacked on and integrated with the first porous layer 1a by a binding force acting between polytetrafluoroethylene matrices.
    Type: Grant
    Filed: July 11, 2008
    Date of Patent: April 15, 2014
    Assignee: Nitto Denko Corporation
    Inventors: Yuri Horie, Kouji Furuuchi
  • Publication number: 20140083795
    Abstract: The present disclosure provides a compound membrane and an acoustic device including such a compound membrane. The compound membrane includes a polyetherimide film, and a thermoplastic polyurethance elastomer attached to one surface of the polyetherimide film.
    Type: Application
    Filed: September 23, 2013
    Publication date: March 27, 2014
    Applicants: AMERICAN AUDIO COMPONENT (SHENZHEN) CO., LTD., AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) CO., LTD.
    Inventors: Xing-Zhi Huang, Jing He
  • Patent number: 8672088
    Abstract: A phase plugs or acoustic lens improves the directional audio performance of a loudspeaker. Application of the improved directional audio performance to a sound system in a listening area may improve the performance of the audio system. Configuration of the acoustic lens or phase plug may include both symmetrical and asymmetrical features to provide an improved frequency response and directivity. The improved loudspeaker may provide improved an improved listing location, for example, in a vehicle.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: March 18, 2014
    Assignee: Harman International Industries, Inc.
    Inventors: Brian Sterling, John Sheerin, Douglas Hogue, Peter Premo
  • Publication number: 20140054104
    Abstract: A speaker diaphragm structure includes a speaker diaphragm and a coating formed on the speaker diaphragm and is composed of at least one dense layer and relatively porous layer alternately arranged with respect to the at least one dense layer.
    Type: Application
    Filed: July 11, 2013
    Publication date: February 27, 2014
    Inventors: Ju-Liang HE, Po-Yu CHEN
  • Patent number: 8646570
    Abstract: In a diaphragm of an electric sound converter which converts vibration such as sound into an electrical signal, a center dome is reinforced while suppressing variations in the sensitivity and frequency response to the minimum, whereby reduction in a high-pass reproduction limit is suppressed, and occurrence of anomalous resonance is prevented. In a diaphragm 1 of an electric sound converter having a center dome 2, a reinforcing film 7 made of the same material as that of the center dome and formed into the same shape as that of the center dome is applied to the center dome with a hot-melt adhesive 6 of the same nature as that of the center dome, a groove 7a formed in a polygonal reticulate pattern is provided on one surface of the reinforcing film adhered with the adhesive, and a convex rib 8 corresponding to the groove is formed on the other surface.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: February 11, 2014
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Hiroshi Akino
  • Patent number: 8616329
    Abstract: A broadband acoustic lens and method of designing same is provided for focusing an incident acoustic wave. The broadband lens includes a plurality of concentric rings, where each concentric ring of the plurality of concentric rings has a ring width, and a plurality of gaps, where each gap of the plurality of gaps has a spacing. The concentric rings are separated by a spacing corresponding to a gap of the plurality of gaps. The widths of the plurality of concentric rings and the spacings of the plurality of gaps are arranged such that the incident acoustic wave is focused to a spot within a sub-wavelength of the incident acoustic wave in air. The arrangement of the widths of the plurality of concentric rings and spacings of the plurality of gaps is aperiodic.
    Type: Grant
    Filed: October 30, 2012
    Date of Patent: December 31, 2013
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: John T Welter, Shamachary Sathish, Daniel Christensen, Jason D Heebl, Philip Brodrick, Matthew R Cherry
  • Publication number: 20130259291
    Abstract: A loudspeaker diaphragm includes a diaphragm portion and an edge portion, which is molded integrally with the diaphragm portion and made of a material different from a material for the diaphragm portion. The edge portion contains at least one thermoplastic polymer (I), in combination with a block polymer (II). The at least one thermoplastic polymer (I) is selected from a block copolymer (I-a) which contains a polymer block (A) having a repeating structural unit derived from an aromatic vinyl compound and a polymer block (B) having a repeating structural unit derived from a conjugated diene, and an addition hydrogenated block copolymer (I-b) of the block copolymer (I-a). The block copolymer (II) contains a polymer block (C) having a repeating structural unit derived from an olefin compound and a polymer block (D) having a repeating structural unit derived from a (meth)acrylic compound.
    Type: Application
    Filed: March 15, 2013
    Publication date: October 3, 2013
    Applicant: ONKYO CORPORATION
    Inventor: Takeshi FUJITANI
  • Patent number: 8544595
    Abstract: A carbonaceous acoustic diaphragm whose density is reduced while retaining the required stiffness is provided. Carbon nanofibers and spherical particles of PMMA are mixed into a carbon-containing resin such as a polyvinyl chloride resin, and the mixture is carbonized to vaporize the spherical particles of PMMA, thereby forming a porous structure having pores with the carbon nanofibers in a powdered form uniformly dispersed through amorphous carbon. By forming a multilayer structure by combining the porous layer with a layer that does not use PMMA, the density can be further reduced while retaining the stiffness.
    Type: Grant
    Filed: December 8, 2009
    Date of Patent: October 1, 2013
    Assignee: Mitsubishi Pencil Company, Limited
    Inventors: Takeshi Suzuki, Atsunori Satake, Noboru Kanba, Akihito Mitsui, Yoshihisa Suda
  • Patent number: 8548188
    Abstract: A diaphragm includes a carbon nanotube film structure and an amorphous carbon structure composited with the carbon nanotube structure to form a stratiform composite structure. The carbon nanotube film structure defines a plurality of micropores therein. The amorphous carbon structure comprises a plurality of amorphous carbon particles received in the micropores.
    Type: Grant
    Filed: June 28, 2010
    Date of Patent: October 1, 2013
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Jia-Ping Wang, Liang Liu