Electro-acoustic Audio Transducer Patents (Class 381/150)
  • Patent number: 10764687
    Abstract: The present invention provides a sound generator, includes a frame with an accommodating space, a magnetic circuit system and a vibration system. The magnetic yoke includes a bottom wall, a side wall and a supporting plate bending and extending from the side wall. The frame includes an upper surface close to the diaphragm and a lower surface provided with a fixing post. The spring includes an inner edge close to the accommodating space and an outer edge opposite to the inner edge and far away from the accommodation space. The fixing post is provided between the inner edge of the spring and the side wall. Compared to the relate art, the spring of the present invention can make more effective use of space, ensure the spring size, thus reducing the low-frequency response of the sound generator to further improve the acoustic performance.
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: September 1, 2020
    Assignee: AAC Technologies Pte. Ltd.
    Inventors: Jiasheng Zhou, Long Zhang
  • Patent number: 10647150
    Abstract: A three-dimensional sticker has an adhering layer removably attaching the three-dimensional sticker to an object. A filler material is positioned on an interior surface of the adhering layer, the filler material forming a three-dimensional configuration. A recording device is positioned on the interior surface of the adhering layer allowing the three-dimensional sticker to play a pre-recorded message and record a new message. A cover layer is positioned over the interior surface of the adhering layer enclosing the filler material and the recording device between the interior surface of the adhering layer and the cover layer.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: May 12, 2020
    Inventor: Deanna Zitzmann
  • Patent number: 10580411
    Abstract: A change in the phase pattern of the inter-mic impulse response (IMIR), determined by a cross power spectral density, may be used to detect the appearance of a new talker or a dramatic movement of the current talker. For example, the phase of the IMIR is dependent on a location of the sound source relative to the microphone array. Any signal originating from a specific location has a specific phase pattern on the IMIR across the frequency domain. By comparing phase patterns of the current cross power spectral density with a recorded talker phase profile, a talker change can be detected. This detection can be used to control signal processing algorithms. For example, when talker change is detected, the step size of an adaptive filter can be increased to track the changes efficiently.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: March 3, 2020
    Assignee: Cirrus Logic, Inc.
    Inventors: Ying Li, Ghassan Maalouli, Narayan Kovvali, Seth Suppappola
  • Patent number: 10575089
    Abstract: Examples are disclosed for a waveguide for a loudspeaker, the waveguide including a first and second outer shell coupled to one another, and a first and second inner shell coupled to one another and positioned within an air gap between the first and second outer shells, a plurality of sound paths being formed between an exterior surface of the first inner shell and an interior surface of the first outer shell and between an exterior surface of the second inner shell and an interior surface of the second outer shell, each of the plurality of sound paths having an equal path length in a plurality of planes.
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: February 25, 2020
    Assignee: Harman International Industries, Incorporated
    Inventors: Jacques Spillmann, Steven Patrick Riemersma, Mark Thomas DeLay
  • Patent number: 10567897
    Abstract: An electroacoustic transducer comprises a sleeve extending along a longitudinal axis; a diaphragm coupled to the sleeve at a first end of the sleeve; a subassembly in the sleeve; and an alignment element extending from the subassembly in a direction substantially away from the diaphragm.
    Type: Grant
    Filed: April 19, 2018
    Date of Patent: February 18, 2020
    Assignee: BOSE CORPORATION
    Inventors: Christopher A. Pare, David W. Beverly
  • Patent number: 10492003
    Abstract: A content output system is provided. The content output system includes a display apparatus configured to display a user interface (UI) for guiding a user input for setting a speaker corresponding to each of a plurality of channels according to a predetermined event and a plurality of speaker apparatuses configured to, in response to a user input corresponding to the user input guide being received, transmit a first signal corresponding to the user input to the display apparatus.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: November 26, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ji-seon Baek, Je-ik Kim, Ho-jin Eo, Kwan-soo Lee, Seung-pyo Hong
  • Patent number: 10477318
    Abstract: A method includes, with a portable, wireless transceiver, detecting a predetermined motion pattern of the transceiver; and in response to detecting the predetermined motion pattern of the transceiver, transmitting a wireless wake signal from the portable transceiver to a sleeping computer. A corresponding portable transceiver unit includes: a microphone to receive spoken voice commands from a user; a wireless transceiver to wirelessly communicate with a separate computer; and a motion sensor to detect a predetermined motion pattern at the portable transceiver unit. The wireless transceiver, in response to the motion sensor detecting the predetermined motion pattern of the transceiver, wirelessly transmits a wake signal to the computer.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: November 12, 2019
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: David H. Hanes
  • Patent number: 10455338
    Abstract: A method and an apparatus for removing dust in a sound outlet hole of a loudspeaker and a terminal device are disclosed. The method includes reading a prestored audio frequency for removing dust; and playing the audio file for removing dust. When the loudspeaker plays the audio file for removing dust, a wind speed in the sound outlet hole is at a maximum.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: October 22, 2019
    Assignee: Guangdong Oppo Mobile Telecommunications Corp., Ltd.
    Inventor: Ling Ouyang
  • Patent number: 10419858
    Abstract: A non-uniform stress distribution of a MEMS microphone having a non-circular shape is compensated by a structured back plate that has a compensating structure to provide a stress distribution opposite to that of the membrane.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: September 17, 2019
    Assignee: TDK Corporation
    Inventors: Jan Tue Ravnkilde, Dennis Mortensen, Morten Ginnerup
  • Patent number: 10375462
    Abstract: A silica gel diaphragm, a receiver module, and a method for processing a silica gel diaphragm. Two metal pieces are integrally injection-molded on the diaphragm, and symmetrically embedded into the diaphragm, and either end of each of the metal pieces is provided with first and second soldering portions; each of the first soldering portions is embedded into a planar portion of the diaphragm, and is used for soldering a winding tap of a voice coil on an inner side of the voice coil; each of the second soldering portions protrudes from or is embedded into the fixing portion of the diaphragm, and is used for soldering a bonding pad on a housing; and middle portions connecting the first soldering portions and the second soldering portions are embedded into the diaphragm to form an electrically conductive path. This technical solution increases the product stability.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: August 6, 2019
    Assignee: Goertek Inc.
    Inventors: Chunfa Liu, Xiaodong Guo
  • Patent number: 10362404
    Abstract: A frame is coupled to a magnetic circuit. The frame includes a plurality of holes which are formed outside the coupling portion and opened toward the magnetic circuit. A case covers the magnetic circuit and the frame, and is opened on a sound radiation direction side. An outer circumferential portion of the case is located on the sound radiation direction side beyond the plurality of holes and forms a first gap with respect to the frame. The first gap is communicated with an opening of the case.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: July 23, 2019
    Assignees: PIONEER CORPORATION, TOHOKU PIONEER CORPORATION
    Inventors: Yoshitaka Junicho, Kazuyuki Tamaya, Satoshi Chiba, Yohji Ogata, Natsumi Ota
  • Patent number: 10334339
    Abstract: A MEMS transducer package (1) comprises a semiconductor die element (3) and a cap element (23). The semiconductor die element (3) and cap element (23) have mating surfaces (9, 21). The semiconductor die element (3) and cap element (23) are configured such that when the semiconductor die element (3) and cap element (4) are conjoined, a first volume (7, 27) is formed through the semiconductor die element (3) and into the semiconductor cap element (23), and an acoustic channel is formed to provide an opening between a non-mating surface (11) of the semiconductor die element (3) and a side surface (10, 12) of the transducer package.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: June 25, 2019
    Assignee: Cirrus Logic, Inc.
    Inventors: John Laurence Pennock, Tsjerk Hoekstra, David Talmage Patten
  • Patent number: 10292626
    Abstract: A screening device for conducting a tone audiometry includes a tone generator, an input device, and a controller device. The controller device is arranged to repeatedly perform: selecting a test stimulus from a group of test stimuli; applying the selected test stimulus to a test person; receiving via the input device from the test person a response indicating which test stimulus was heard by the test person; and adjusting an intensity according to the received response for selecting a next test stimulus. The group of test stimuli includes (i) no tone at all, (ii) a single tone with a first frequency and a first given intensity, and (iii) a multitude of tones of a second frequency and a second given intensity. The second frequency is higher than the first frequency and the multitude of tones have a duration shorter than the duration of the single tone.
    Type: Grant
    Filed: September 18, 2012
    Date of Patent: May 21, 2019
    Assignee: JACOTI BVBA
    Inventor: Karin Coninx-Wittgens
  • Patent number: 10271144
    Abstract: A speaker unit according to an embodiment includes a diaphragm, a frame, and a current plate. The frame supports an outer circumferential portion of the diaphragm. The current plate is provided in the frame so as to be located at a backside of the diaphragm, and its principal surface is arranged in a direction along an amplitude direction of the diaphragm.
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: April 23, 2019
    Assignee: FUJITSU TEN LIMITED
    Inventors: Yuichi Nakajima, Kayo Takamatsu
  • Patent number: 10110987
    Abstract: Described are a headphone and a method for controlling an audio system. The method includes tapping a headphone or head of a user to cause an acoustic pressure change in an ear canal of the user wherein the ear canal is sealed by an acoustic noise reduction (ANR) headphone having an ANR module. A current provided to the ANR module is sensed. A peak value of the sensed current is determined and compared to a value of an adaptive threshold to determine if a tap occurred. If a tap is determined to have occurred, an updated value for the adaptive threshold is determined based on the peak value and at least on prior peak value. A mode of operation of the audio system or an attribute of an audio input signal may be changed in response to the determination of an occurrence of a tap.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: October 23, 2018
    Assignee: BOSE CORPORATION
    Inventor: Paul Yamkovoy
  • Patent number: 10015599
    Abstract: Disclosed is a micro speaker, comprising a vibration system, a magnetic circuit system and a support system; the vibration system comprises a vibrating diaphragm; a dodging groove is provided on a dome portion of the vibrating diaphragm opposite to a groove structure of an upper housing; the depth of the dodging groove is not less than that of the groove structure; an orthographic projection area of the dodging groove covers that of the groove structure; a dodging structure is provided on a washer of the magnetic circuit system opposite to the dodging groove; the depth of the dodging structure is not less than that of the dodging groove; and the orthographic projection area of the dodging structure covers that of the dodging groove. This structure ensures the normal operation of a product and acoustic performance of a micro speaker while preventing collision of components.
    Type: Grant
    Filed: November 4, 2015
    Date of Patent: July 3, 2018
    Assignee: GOERTEK INC.
    Inventors: Shuangshuang Fan, Gang Chen, Yun Yang, Xinxiang Huo, Dan Han
  • Patent number: 9913046
    Abstract: A sound generator includes a housing (20), a piezoelectric vibrator (60) including a piezoelectric element (61), at least a portion of the piezoelectric vibrator (60) protruding from the housing (20), and an anchor (10) applying a load to the piezoelectric vibrator (60). A portion or all of the piezoelectric vibrator (60) withdraws into the housing (20) under a force of a predetermined load or greater. While the load from the anchor (10) is being applied to the piezoelectric vibrator (60), the piezoelectric vibrator (60) deforms in response to a sound signal, and deformation of the piezoelectric vibrator (60) vibrates a contact surface contacted by the piezoelectric vibrator (60), causing sound to be emitted from the contact surface.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: March 6, 2018
    Assignee: KYOCERA Corporation
    Inventors: Satoshi Fukami, Hiroshi Taimura, Kazuchika Suzuki, Seiji Horii
  • Patent number: 9783408
    Abstract: A structure of micro-electro-mechanical systems (MEMS) electroacoustic transducer is disclosed. The MEMS electroacoustic transducer includes a substrate having a MEMS device region, a diaphragm having openings and disposed in the MEMS device region, a silicon material layer disposed on the diaphragm and sealing the diaphragm, and a conductive pattern disposed beneath the diaphragm in the MEMS device region. Preferably, a first cavity is also formed between the diaphragm and the substrate.
    Type: Grant
    Filed: June 18, 2014
    Date of Patent: October 10, 2017
    Assignee: UNITED MICROELECTRONICS CORP.
    Inventors: Bang-Chiang Lan, Ming-I Wang, Li-Hsun Ho, Hui-Min Wu, Min Chen, Chien-Hsin Huang
  • Patent number: 9756159
    Abstract: A handphone is configured to receive a first audio signal of a telecommunication conversation from a telecommunication device and send a second audio signal of the telecommunication conversation to the telecommunication device. A modulated ultrasound frequency audio signal that is directional is created from the first audio signal of the telecommunication conversation. The modulated ultrasound frequency audio signal is output via a loudspeaker. A direction of the modulated ultrasound frequency audio signal is controlled by a physical object and a location of the loudspeaker.
    Type: Grant
    Filed: February 13, 2014
    Date of Patent: September 5, 2017
    Assignee: NEW YORK UNIVERSITY
    Inventor: Tae Hong Park
  • Patent number: 9749761
    Abstract: An example implementation may involve a playback device assigning, to the playback device, a zone property that is assigned to a device base (e.g., a charging base) that the playback device is placed upon. For instance, a playback device may identify a particular base onto which the playback device is placed. The playback device may determine that the particular base is assigned a zone property that is associated with a first zone of a media playback system. The playback device may assign, to the playback device, the zone property that is assigned to the particular base. By acquiring the zone property, the playback device may join the first zone of the media playback system. Other example implementations may involve assigning a zone property to a device base, or modify a zone property of a device base, among other examples.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: August 29, 2017
    Assignee: Sonos, Inc.
    Inventor: Benjamin Rappoport
  • Patent number: 9735747
    Abstract: Techniques related to balancing audio for mobile devices are discussed. Such techniques may include detecting a speaker of the device is at least partially obstructed, determining an audio output from the device is impeded due to the speaker being at least partially obstructed, and increasing an output from the speaker and/or an alternative speaker based on the audio output from the device being impeded.
    Type: Grant
    Filed: July 10, 2015
    Date of Patent: August 15, 2017
    Assignee: Intel Corporation
    Inventors: Tomer Rider, Shahar Taite, Igor Ljubuncic, Raphael Sack
  • Patent number: 9621980
    Abstract: A dynamic microphone includes: a diaphragm; a voice coil fixed to the diaphragm; a magnetic circuit which includes a magnetic gap in which the voice coil is arranged and generates a magnetic field in the magnetic gap; a volume reducing member which is attached to the magnetic circuit, is arranged in a back surface space of the diaphragm, and reduces a volume in an air chamber in the back surface space; a communication passage which is formed along between the volume reducing member and the magnetic circuit and communicates the back surface space with a back side air chamber; and an acoustic resistance which is attached to the magnetic circuit and intervenes between the communication passage and the back side air chamber.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: April 11, 2017
    Assignee: KABUSHIKI KAISHA AUDIO-TECHNICA
    Inventor: Hiroshi Akino
  • Patent number: 9544701
    Abstract: An example implementation may involve a playback device assigning, to the playback device, a zone property that is assigned to a device base (e.g., a charging base) that the playback device is placed upon. For instance, a playback device may identify a particular base onto which the playback device is placed. The playback device may determine that the particular base is assigned a zone property that is associated with a first zone of a media playback system. The playback device may assign, to the playback device, the zone property that is assigned to the particular base. By acquiring the zone property, the playback device may join the first zone of the media playback system. Other example implementations may involve assigning a zone property to a device base, or modify a zone property of a device base, among other examples.
    Type: Grant
    Filed: July 19, 2015
    Date of Patent: January 10, 2017
    Assignee: Sonos, Inc.
    Inventor: Benjamin Rappoport
  • Patent number: 9471698
    Abstract: Embodiments of the present invention provide a method and system for embedding, transmitting and receiving a Quick Response (QR) code in an audio file. Initially, a set of data representing a QR Code and an audio file is received. A third file is generated based on a combination of the QR code and the audio file. The third file is broadcasted and received by a device. Data representing the QR code is extracted from the third file and displayed as an object on the device.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: October 18, 2016
    Assignee: International Business Machines Corporation
    Inventors: Ju Ling Liu, Yi Liu, Yicen Pan
  • Patent number: 9408009
    Abstract: A wearable electronic device is discussed. The device has a housing and a processor in the housing. The processor can enable the wearer of the device to select different operations from an onscreen display. The device also has a communication circuit in the housing to transmit wirelessly to another device cooperating with the electronic device. The device has a microphone hole penetrating the housing to a microphone, a microphone seal component, and a waterproof material in the housing. The microphone seal component has channels and when compressed against the waterproof material can i) allow sound waves in air to pass through to the microphone inside the housing behind the waterproof material and the microphone seal component, ii) form a water tight seal for the microphone hole penetrating the housing, and iii) provide an air pressure equalization mechanism between internal pressure inside the housing and atmospheric pressure external to the housing.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: August 2, 2016
    Assignee: Pebble Technology, Corp.
    Inventors: Andrew James Witte, Sean Eugene Daley, Tien Ching Li, Zinovy Dolgonosov, Steven William Johns
  • Patent number: 9337883
    Abstract: A protection case for a mobile communication device includes a main body for receiving the mobile communication device, a main circuit board with an amplifier installed thereon, and a vibrator electrically connected to the amplifier. The amplifier comprises audio signal input terminals for receiving audio signals from the mobile communication device, and audio signal output terminals for outputting the audio signals which are amplified by the amplifier to the vibrator; the vibrator is driven to vibrate in accordance with the audio signals output by the amplifier.
    Type: Grant
    Filed: January 19, 2015
    Date of Patent: May 10, 2016
    Assignee: AAC Technologies Pte. Ltd.
    Inventors: Hongxing Wang, Rongguan Zhou
  • Patent number: 9232311
    Abstract: The method comprises the determination of an observation vector that comprises only electrical measurements of the voltage (Umes) at the loudspeaker terminals and of the current (i) passing through the loudspeaker, and a state vector (X) whose components comprise: values of linear parameters of the loudspeaker response such as the electrical (Re) and mechanical (Req) resistance, and polynomial coefficients of nonlinear parameters such as the force factor (BI), the equivalent stiffness (Keq) and the electrical inductance (Le). The voltage and current measurements are applied to an estimator with a predictive filter of the extended Kalman filter incorporating a representation of a dynamic model of the loudspeaker. This filter operates a prediction of the state vector (X) and readjusts this prediction by calculation of an estimate (Uest) of the voltage based on the state vector and on the measured current and comparison of this estimate with the measurement (Umes) of the voltage.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: January 5, 2016
    Assignee: Parrot
    Inventor: Vu Hoang Co Thuy
  • Patent number: 9210491
    Abstract: An electronic amplifier device amplifies magnetic audio signals emanating from a portable electronic device placed thereon. The electronic amplifier device includes a housing having a designated area for placement of the portable electronic device thereon, an amplifier circuit, and at least one loudspeaker electrically coupled to the amplifier circuit. A wireless audio coupler circuit situated within the electronic amplifier device includes a magnetic signal pick-up coil which is situated in close proximity to the designated area on the housing. The magnetic signal pick-up coil senses magnetic signals emanating from the portable electronic device placed on the designated area of the housing, and the electronic amplifier device amplifies these signals and provides them to the loudspeaker.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: December 8, 2015
    Assignee: VOXX International Corporation
    Inventors: Prapan Paul Tinaphong, John Anthony Andrews, Songling Zhao, Nathan T. Frame, S Ian Geise, David A. Benedetti, Kevin Kei Kwan Lee
  • Patent number: 9053709
    Abstract: The present invention relates to a control device, a control method, and a program capable of improving operability with a simpler configuration. A reproducing apparatus 11 which reproduces sound such as music includes earphones 21 which are worn by a user on the ears and a body 22. A sound pickup unit 31 collects sounds around the reproducing apparatus 11, and a determination unit 34 extracts future amounts from the collected sound and determines whether the sound corresponds to an operation sound generated when the sound pickup unit 31 is directly tapped by the user. A controller 35 executes a process in accordance with a result of the determination performed by the determination unit 34. For example, when a sound pickup unit 31-1 is tapped once within a predetermined period of time, the controller 35 instructs a reproduction controller 39 to stop reproduction of music.
    Type: Grant
    Filed: December 12, 2010
    Date of Patent: June 9, 2015
    Assignee: SONY CORPORATION
    Inventors: Toru Chinen, Yuki Yamamoto, Mitsuyuki Hatanaka
  • Publication number: 20150139453
    Abstract: A microphone comprises a microphone unit; and a HOT terminal and a COLD terminal that produce a balanced output of output signals of the microphone unit, and no filter circuit is disposed between the microphone unit and the HOT terminal and a low-pass filter is disposed only between the microphone unit and the COLD terminal.
    Type: Application
    Filed: October 16, 2014
    Publication date: May 21, 2015
    Applicant: KABUSHIKI KAISHA AUDIO-TECHNICA
    Inventor: Hiroshi Akino
  • Publication number: 20150139452
    Abstract: An electro-acoustic transducer includes a plurality of elements that each includes a plurality of cells. The plurality of cells includes at least two membranes that have different thicknesses. The respective frequency bands of the plurality of elements are broader than respective frequency bands of the plurality of cells that configure the plurality of elements.
    Type: Application
    Filed: April 28, 2014
    Publication date: May 21, 2015
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sang-ha PARK, Sung-chan KANG, Dong-kyun KIM, Seog-woo HONG
  • Patent number: 9036835
    Abstract: An apparatus is described that includes an audio power amplifier having an input and an output. An alternating-current to direct-current power converter is coupled to the audio power amplifier in a single package to supply power to the audio power amplifier.
    Type: Grant
    Filed: November 5, 2007
    Date of Patent: May 19, 2015
    Assignee: AliphCom
    Inventor: David C. Buuck
  • Patent number: 9029179
    Abstract: A method for producing a MEMS device having improved charge elimination characteristics includes providing a substrate having one or more layers, and applying a first charge elimination layer onto at least one portion of one given layer of the substrate. The method may then (1) apply a sacrificial layer onto the first charge elimination layer, (2) apply a second charge elimination layer onto at least a portion of the sacrificial layer, and (3) deposit a movable layer onto at least a portion of the second charge elimination layer. To form a structure within the movable layer the method may etch the movable layer. The method may then etch the sacrificial layer to release the structure.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: May 12, 2015
    Assignee: Analog Devices, Inc.
    Inventors: Fang Liu, Kuang L. Yang
  • Patent number: 9030409
    Abstract: According to an embodiment, a method for controlling a portable device connected to an earphone having a coil includes detecting removal of one of left and right units of the earphone worn by a user, generating an electromagnetic pattern corresponding to an Identifier(ID) of the portable device at the removed unit of the earphone, and receiving data from the external device in correspondence with the ID of the portable device. According to an embodiment, a method for controlling a display device includes displaying a Graphic User Interface on a display unit, sensing an earphone within a detection area of the display unit, sensing an electromagnetic pattern of the earphone within a detection area of the display unit, acquiring an ID of an external device connected to the earphone from the sensed electromagnetic pattern, and transmitting data to the external device identified by the acquired ID of the external device.
    Type: Grant
    Filed: April 3, 2013
    Date of Patent: May 12, 2015
    Assignee: LG Electronics Inc.
    Inventors: Jihwan Kim, Jungbin Yim, Sihwa Park
  • Publication number: 20150110300
    Abstract: According to an embodiment, an interface circuit includes a current replicator and a receiver. The current replicator includes a power terminal coupled to a first reference node, an output terminal configured to output a signal proportional to a signal received from a transducer, and an interface terminal coupled to the transducer. Using a single interface terminal, the current replicator may be configured to provide power to the transducer and receive output signals from the transducer. The receiver may include a first input terminal coupled to the output terminal, a second input terminal coupled to a second reference node, and a current converter circuit coupled to the first input terminal.
    Type: Application
    Filed: October 22, 2013
    Publication date: April 23, 2015
    Applicant: INFINEON TECHNOLOGIES AG
    Inventors: Wilfried Florian, Andreas Wiesbauer, Richard Gaggl
  • Publication number: 20150104046
    Abstract: An ultrasonic audio speaker includes an emitter and a driver. The emitter can include a first layer having a conductive surface; a second layer having a conductive surface; and an insulating layer disposed between the first and second conductive surfaces, wherein the first and second layers are disposed in touching relation to the insulating layer. The driver circuit can include two inputs configured to be coupled to receive an audio modulated ultrasonic signal from an amplifier and two outputs, wherein a first output is coupled to the conductive surface of the first layer and the second output is coupled to the conductive surface of the second layer. Either one or both of the conductive surfaces of the first and second layers may be graphene.
    Type: Application
    Filed: October 10, 2014
    Publication date: April 16, 2015
    Inventor: Elwood G. Norris
  • Patent number: 8983105
    Abstract: A microphone is disclosed in which a housing is formed by a cap (13) sealed to a substrate (11). A MEMS die (10) is mounted on the substrate (11), the MEMS die (10) incorporating a membrane (12). The membrane (12) has a first surface facing the substrate and in fluid communication with an acoustic inlet port (14) in the cap (13) via an acoustic path (17) and a second surface facing the inner surface of the cap, which second surface along with part of the inner surface of the cap (13) defines at least part of a sealed chamber (19) within which a volume of air is trapped.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: March 17, 2015
    Assignee: Knowles IPC (M) Sdn. Bhd.
    Inventor: Friedrich Reining
  • Publication number: 20150043757
    Abstract: This application discusses a system that can include a master device and a slave device coupled to the master device via an audio jack connector. In an example, the master device and the slave device can be configured to exchange information via a single conductive path of the audio jack connector using a digital communication protocol. The single conductive path can be configured to conduct audio signals of an audio transducer and the slave device can include a depletion-mode transistor to complete a circuit including the audio transducer and the single conductive path in a first state, and to isolate the audio transducer from the single conductive path in a second state.
    Type: Application
    Filed: August 6, 2014
    Publication date: February 12, 2015
    Inventor: Seth M. Prentice
  • Patent number: 8917896
    Abstract: A loudspeaker includes a horn including a first end panel, a second end panel, a first side panel, and a second side panel. Edges of at least the first and second side panels define a diffraction slot opening. The first and second side panels are each fabricated from a sheet of flexible material held in a stressed, curved shape by at least a rigid support member. The panels are designed by an automated process based on a number of electro-acoustic transducers to be used in a loudspeaker, horizontal and vertical coverage angles for the loudspeaker, and a wall length for a horn of the loudspeaker.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: December 23, 2014
    Assignee: Bose Corporation
    Inventors: Christopher B. Ickler, Clifford A. Henricksen, Akira Mochimaru, Kenneth D. Jacob, Soichiro Hayashi
  • Publication number: 20140369531
    Abstract: Self-bias emitter circuit configurations can use the amplitude of an input AC carrier signal to provide a DC bias voltage across an emitter for suitable operation. A self-bias emitter circuit can include a transductor with primary matched with an amplifier, while secondary can be matched to the emitter. Self-bias emitter circuit can also include a full-wave bridge rectifier or a center tap inductor in conjunction with two diodes to rectify the AC carrier signal into a corresponding DC voltage. This DC voltage can be subsequently filtered by a capacitor to provide a steady DC bias voltage across the emitter. Sufficiently small, decoupling capacitors can be installed at each side of the full-wave rectifier in order to decouple the DC bias voltage, while a sufficiently large capacitor can be installed between the emitter and secondary for preventing the applied DC bias voltage from flowing back to secondary.
    Type: Application
    Filed: June 13, 2013
    Publication date: December 18, 2014
    Inventor: Elwood G. Norris
  • Publication number: 20140369532
    Abstract: In an electro-acoustic transducer including a needle electrode and a counter electrode facing the needle electrode and inducing electric discharge between the needle electrode and the counter electrode for electro-acoustic conversion by an RF voltage applied across the needle electrode and the counter electrode, the counter electrode has a cylindrical surface surrounding plasma extending from the needle electrode and has a cutout in a part of the cylindrical surface. This configuration prevents a short circuit between the needle electrode and the counter electrode due to plasma.
    Type: Application
    Filed: May 23, 2014
    Publication date: December 18, 2014
    Applicant: Kabushiki Kaisha Audio-Technica
    Inventor: Hiroshi Akino
  • Patent number: 8913766
    Abstract: A MEMS device, such as a microphone, uses a fixed perforated plate. The fixed plate comprises an array of holes across the plate area. At least a set of the holes adjacent the outer periphery comprises a plurality of rows of elongate holes, the rows at different distances from the periphery. This design improves the mechanical robustness of the membrane and can additionally allow tuning of the mechanical behavior of the plate.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: December 16, 2014
    Assignee: NXP, B.V.
    Inventors: Iris Bominaar-Silkens, Andres Felipe Vasquez Quintero, Klaus Reimann, Twan Van Lippen, Remco Henricus Wilhelmus Pijnenburg
  • Publication number: 20140363032
    Abstract: Provided is a modulation circuit that can correct an output state in real time and reliably modulate an input signal to output the modulated signal. The signal modulation circuit includes a subtracter, an integrator, a chopper circuit, a frequency divider, and a D-type flip-flop. A delay circuit of a sigma delta modulation circuit is not provided to a feedback circuit, and a signal is delayed and quantized in the D-type flip-flop. The chopper circuit inserts a zero level at timing synchronized with a clock signal, so that pulse density modulation is performed.
    Type: Application
    Filed: June 4, 2014
    Publication date: December 11, 2014
    Inventors: Yoshinori NAKANISHI, Tsuyoshi KAWAGUCHI, Mamoru SEKIYA
  • Patent number: 8897465
    Abstract: A micro-speaker. The micro-speaker includes a first plate, a second plate, and a diaphragm. The first plate is biased to a first voltage. The second plate is biased to a second voltage. The diaphragm is positioned between the first plate and the second plate and is configured to receive a digital signal. The digital signal causes the diaphragm to cycle between fully displaced toward the first plate and fully displaced toward the second plate, creating air pressure pulses that mimic the digital signal.
    Type: Grant
    Filed: June 1, 2011
    Date of Patent: November 25, 2014
    Assignee: Robert Bosch GmbH
    Inventor: John M. Muza
  • Publication number: 20140341400
    Abstract: An impedance matched resonant circuit uses inductors coupling an audio source and a speaker array in order to reduce feedback reflection induced by an audio signal traveling from the audio source to the array of speakers. An RC circuit could also be coupled to the positive and negative terminals of the speaker array to reduce the slope differential of the audio signal at certain frequencies. The circuit can be packaged together in a single module with switches to activate and deactivate portions of the circuit to alter the effectiveness of the circuit depending upon need.
    Type: Application
    Filed: May 15, 2014
    Publication date: November 20, 2014
    Applicant: Colorado Energy Research Technologies, LLC
    Inventors: Wayne J. Powell, Robert D. Boehmer
  • Publication number: 20140341399
    Abstract: Embodiments of the disclosure may provide an apparatus and method of controlling and altering the acoustic output of audio devices that are used in conjunction with a computing device. In some embodiments, the apparatus and methods include a wireless speaker communication method and computing device software application that are configured to work together to more easily setup and deliver audio information from an audio source to one or more portable audio speakers.
    Type: Application
    Filed: May 13, 2014
    Publication date: November 20, 2014
    Applicant: Logitech Europe S.A
    Inventors: Stephen DUSSE, Doug EBERT, Dudley Guy Kiang WONG, Biqing (Becky) WU, Jon Albert HOWELL, Kelly FRY
  • Patent number: 8891335
    Abstract: An apparatus for generating ultra-high frequency sound waves with frequencies between (1 GHz-10 GHz) is proposed. The apparatus comprises a magnetic phonon-gain medium configured to generate high frequency non-equilibrium phonons by non-equilibrium magnons having the magnon velocity exceeding the sound velocity in the magnetic phonon-gain medium. The non-equilibrium magnons having the magnon velocity exceeding the sound velocity in the magnetic phonon-gain medium are generated by injected non-equilibrium electrons having spin opposite to the direction of magnetization of the magnetic phonon-gain medium. The apparatus further comprises a means for outputting the ultra-high frequency non-equilibrium phonons.
    Type: Grant
    Filed: October 26, 2012
    Date of Patent: November 18, 2014
    Inventors: Boris G. Tankhilevich, Yehiel Korenblit
  • Publication number: 20140335910
    Abstract: An apparatus and method allow end users to interactively create complex lighting patterns by remote control. Applications include decorative lighting, landscape lighting, signage, or advertising platforms. A lighting control system can be equipped with sensors that can receive remote control signals from a variety of different sources, and route the control signals to modulate receptacles coupled to different lighting circuits, thereby independently controlling multiple light arrays to achieve separate light patterns, or to coordinate different lighting effects. The control signals can independently energize localized groups of lamps to provide enhanced lighting effects, while using significantly less wire material. Interactive remote control can be provided via a mobile computing device such as a smart phone running a customized program. In one embodiment, the remote control device communicates selections to a Bluetooth®-equipped speaker to produce sound-controlled lighting effects.
    Type: Application
    Filed: March 13, 2014
    Publication date: November 13, 2014
    Inventor: Jessica Wang
  • Publication number: 20140334648
    Abstract: An apparatus and method allow end users to interactively create complex lighting patterns by remote control. Applications include decorative lighting, landscape lighting, signage, or advertising platforms. A lighting control system can be equipped with sensors that can receive remote control signals from a variety of different sources, and route the control signals to modulate receptacles coupled to different lighting circuits, thereby independently controlling multiple light arrays to achieve separate light patterns, or to coordinate different lighting effects. Interactive remote control can be provided via a mobile computing device such as a smart phone running a customized program. In one embodiment, the remote control device communicates selections to a Bluetooth®-equipped speaker to produce sound-controlled lighting effects.
    Type: Application
    Filed: March 13, 2014
    Publication date: November 13, 2014
    Inventor: Jessica Wang
  • Patent number: 8879757
    Abstract: A thermoacoustic device includes a substrate, a sound wave generator, an insulating layer, a first electrode and a second electrode. The first electrode and the second electrode are spaced from each other and electrically connected to the sound wave generator. The substrate includes a first surface and a second surface opposite to the first surface. The first surface defines a plurality of grooves, and a bulge is formed between the adjacent two grooves. The insulating layer is located on the first surface, and continuously attached on the grooves and the bulge. The sound wave generator is located on the insulating layer. The sound wave generator defines a first portion and a second portion. The first portion is suspended on the grooves. The second portion is attached on the bulge.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: November 4, 2014
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Yang Wei, Xiao-Yang Lin, Kai-Li Jiang, Shou-Shan Fan