Directive Circuits For Microphones Patents (Class 381/92)
  • Patent number: 9747796
    Abstract: Some embodiments of the present disclosure are directed to a method by a device for detecting an approaching vehicle. The method includes recording a sound waveform, and determining whether the recorded sound waveform is associated with a vehicle. A further determination is made whether the vehicle is approaching the device, which recorded the sound waveform, based on determining that the recorded sound waveform is indeed associated with a vehicle. An alert is generated which indicates that the vehicle is approaching the device, based on the determination that the vehicle is approaching.
    Type: Grant
    Filed: July 12, 2016
    Date of Patent: August 29, 2017
    Inventors: Alison Collard De Beaufort, Jonathan Collard De Beaufort, Sonia Grout De Beaufort, Jean-Francois Collard
  • Patent number: 9736578
    Abstract: An orientation detector can have a first microphone, a second microphone, and a reference microphone spaced from the first microphone and the second microphone. An orientation processor can be configured to determine an orientation of the first microphone, the second microphone, or both, relative to a user's mouth based on a comparison of a relative strength of a first signal associated with the first microphone to a relative strength of a second signal associated with the second microphone. A channel selector in a speech enhancer can select one signal from among several signals based at least in part on the orientation determined by the orientation processor. A mobile communication handset can include a microphone-based orientation detector of the type disclosed herein.
    Type: Grant
    Filed: June 7, 2015
    Date of Patent: August 15, 2017
    Assignee: APPLE INC.
    Inventors: Vasu Iyengar, Joshua D Atkins, Aram M. Lindahl, Tarun Pruthi, Ashrith Deshpande
  • Patent number: 9736287
    Abstract: A method of switching between noise reduction modes in multi-microphone mobile devices may include receiving a first sound signal at a first sound receiver and receiving a second sound signal at a second sound receiver. The method may also include determining a first power value associated with the first sound signal and determining a second power value associated with the second sound signal. The method may additionally include comparing the first power value to the second power value and switching between a single-microphone noise reduction mode and a dual-microphone noise reduction mode based on the comparison.
    Type: Grant
    Filed: February 25, 2013
    Date of Patent: August 15, 2017
    Assignee: SPREADTRUM COMMUNICATIONS (SHANGHAI) CO., LTD.
    Inventors: Bin Jiang, Sheng Wu, Fuhuei Lin, Jingming Xu
  • Patent number: 9723402
    Abstract: An electronic device for processing audio data includes: a plurality of microphones configured to receive audio data which has at least one sound section where sounds of a specified frequency band exist within a specified time interval; and an audio data processing module configured to divide the received audio data by each direction of the sound source and collect at least one sound section from the divided audio data of each direction.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: August 1, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Seong Woong Park, Byung Jin Kang, Dae Yun Kim
  • Patent number: 9716946
    Abstract: A system and method for determining an optimal arrangement of microphones for coverage of target sound sources are provided. The method includes receiving at least one geometric constraint respective of a three-dimensional microphone space, wherein the microphone space defines a location for possible deployment of a plurality of microphones; receiving information related to the sound sources, wherein sound sources include at least one target sound source; simulating sound distribution patterns from each of the least target sound sources and each microphone in the deployment of the plurality of microphones; selecting based, in part, on the simulated sound distribution patterns at least one contributing microphone from the deployment of the plurality of microphones; and outputting the optimal arrangement to include the least one contributing microphone.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: July 25, 2017
    Assignee: InSoundz Ltd.
    Inventors: Tomer Goshen, Emil Winebrand
  • Patent number: 9697832
    Abstract: A speech recognition apparatus includes: a sound collection unit that collects a sound signal; a sound source localization unit that calculates a spatial spectrum from the sound signal that is collected by the sound collection unit and uses the calculated spatial spectrum to perform sound source localization; a speech zone determination unit that determines a zone in which a power of the spatial spectrum that is calculated by the sound source localization unit exceeds a predetermined threshold value based on a vehicle state; and a speech recognition unit that performs speech recognition with respect to a sound signal of the zone determined by the speech zone determination unit.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: July 4, 2017
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Kazuhiro Nakadai, Takeshi Mizumoto, Keisuke Nakamura, Masayuki Takigahira
  • Patent number: 9691387
    Abstract: A conversation support apparatus includes: a speech input unit configured to input speech signals of two or more users; a speech recognizing unit configured to recognize the speech signals input from the speech input unit; a display unit configured to display the recognition results of the speech recognizing unit; and an image processing unit configured to set display areas respectively corresponding to the users into an image display area of the display unit.
    Type: Grant
    Filed: October 27, 2014
    Date of Patent: June 27, 2017
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Kazuhiro Nakadai, Keisuke Nakamura
  • Patent number: 9684486
    Abstract: A head mounted display device is used by being mounted on a body of a user and includes an image display unit through which outside scenery is transmitted and which displays an image such that the image is visually recognizable together with the outside scenery. Further, the head mounted display device includes a right headphone and a left headphone outputting a sound. Further, the head mounted display device includes a target detection unit that detects a target of the user in the visual line direction; a distance detection unit that detects a distance between the detected target and the user; and an information output control unit that controls the output of the sound of the right headphone and the left headphone according to the detected distance.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: June 20, 2017
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Kaori Sendai, Atsunari Tsuda, Masahide Takano
  • Patent number: 9681220
    Abstract: Method for spatial filtering of at least one sound signal (M0; W(n)) includes the steps of: generation of a first, a second and a third captured sound signal by capturing of the respective sound signals by microphones characterized by directivity patterns of different orders; performing a short-time Fourier transformation of the captured, sound signal s; measuring a cross-pattern correlation or a cross-pattern coherence towards a desired direction ([phi]); calculation of a gain factor (G+) using a cross-pattern correlation based on time-averaged correlation or coherence between the first captured sound signal and the second captured sound signal; and applying the gain factor (G+) to the corresponding time-frequency positions in the third captured sound, signal (2.3; M0; W(n)). Independent patent claims also for a system and computer readable storage medium.
    Type: Grant
    Filed: November 29, 2013
    Date of Patent: June 13, 2017
    Assignee: AALTO-KORKEAKOULUSÄÄTIÖ
    Inventors: Symeon Delikaris-Manias, Ville Pulkki
  • Patent number: 9668068
    Abstract: A system and method for generating a beamforming signal is disclosed. A beam forming signal is generated by disposing a first microphone and a second microphone in horizontal coplanar alignment. The first and second microphones are used to detect a known signal to generate a first response and a second response. The first response is processed along a first signal path communicatively linked to the first microphone, and the second response is processed along a second signal path communicatively linked to the second microphone. The first and second responses are matched, and the matched responses are combined to generate the beamforming signal on a combined signal path.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: May 30, 2017
    Assignee: Advanced Bionics, LLC
    Inventors: Michael A. Faltys, Abhijit Kulkarni, Scott A. Crawford
  • Patent number: 9668069
    Abstract: Disclosed is a hearing device that may classify sound environment based on a life pattern, and categorize sound information using a sound environment category set based on the life pattern, and control an output of the sound information based on the classified sound environment.
    Type: Grant
    Filed: June 2, 2014
    Date of Patent: May 30, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jooman Han, Dong Wook Kim, Jong Hee Han, See Youn Kwon, Sang Wook Kim, Jun Il Sohn, Jong Min Choi
  • Patent number: 9645230
    Abstract: A detection and ranging apparatus includes a probe signal generating unit that generates a probe signal according to a first modulation method, a transmitting unit that transmits the generated probe signal, a receiving unit that receives a signal including at least one of a reflection signal and an interference signal according to a second modulation method, a demodulating unit that demodulates the reception signal according to a method corresponding to at least one of the first modulation method and the second modulation method, an interference signal detecting unit that detects the interference signal from the demodulated signal, an interference signal identifying unit that identifies specifications and a delay amount of the interference signal from the demodulated signal, and an interference signal removing unit that removes the interference signal within the reception signal by using the identified specifications and the identified delay amount of the interference signal.
    Type: Grant
    Filed: August 20, 2014
    Date of Patent: May 9, 2017
    Assignee: FUJITSU LIMITED
    Inventor: Kazuo Shirakawa
  • Patent number: 9621984
    Abstract: Devices, systems, and methods provide direction finding of an acoustic signal source with respect to a voice-controlled device. The direction can be found without using elevation data, instead determining the horizontal location based on power values of the received signal. A large number of candidate vectors having values for azimuth, elevation, and power may be generated by a steered response power algorithm. The large number of vectors is reduced to a small number of reference azimuths spanning an azimuth range by associating the vectors with the closest reference azimuth and then calculating an average and/or maximum power of the associated vectors at each reference azimuth. The reference azimuth with the highest average (or maximum) power may be set as the direction of the signal source. Alternatively, each reference azimuth having an average (or maximum) power exceeding a threshold may be considered a direction of one of multiple sources.
    Type: Grant
    Filed: October 14, 2015
    Date of Patent: April 11, 2017
    Assignee: AMAZON TECHNOLOGIES, INC.
    Inventor: Wai Chung Chu
  • Patent number: 9615167
    Abstract: Provided is a variable directivity electret condenser microphone that can simplify a circuit configuration, and outputs an audio signal in an unbalanced manner. Included are electrically independent first and second electret condenser microphone units in which first and second fixed electrodes are arranged back to back and facing each other in a mutually non-conductive state, and first and second diaphragms are arranged facing the first and second fixed electrodes with fixed intervals from the first and second fixed electrodes, respectively, a first impedance converter having an input terminal connected to the first fixed electrode, a DC cut capacitor selectively connected between an output terminal of the first impedance converter and an input terminal of the second impedance converter, and a directivity variable switche that can alternatively select a mode from at least a first directivity mode to a third directivity mode.
    Type: Grant
    Filed: May 21, 2015
    Date of Patent: April 4, 2017
    Assignee: KABUSHIKI KAISHA AUDIO-TECHNICA
    Inventor: Hiroshi Akino
  • Patent number: 9613634
    Abstract: A method for cancelling/reducing acoustic echoes in speech/audio signal enhancement processing comprises using a received reference signal to excite an adaptive filter wherein the output of the adaptive filter forms a replica signal of acoustic echo; an adaptation step size is controlled for updating the coefficients of the adaptive filter; the adaptation step size is initialized by using an open-loop approach and optimized by using a closed-loop approach; one of the most important parameters with the open-loop approach is an energy ratio between an energy of a returned echo signal in an input microphone signal and an energy of the received reference signal; one of the most important parameters with the closed-loop approach is a normalized correlation or a square of the normalized correlation between the input microphone signal and the replica signal of acoustic echo; the replica signal of acoustic echo is subtracted from the microphone input signal to suppress the acoustic echo in the microphone input signal
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: April 4, 2017
    Inventor: Yang Gao
  • Patent number: 9595259
    Abstract: A sound source-separating device includes a sound-collecting part, an imaging part, a sound signal-evaluating part, an image signal-evaluating part, a selection part that selects whether to estimate a sound source direction based on the first sound signal or the first image signal, a person position-estimating part that estimates a sound source direction using the first image signal, a sound source direction-estimating part that estimates a sound source direction, a sound source-separating part that extracts a second sound signal corresponding to the sound source direction from the first sound signal, an image-extracting part that extracts a second image signal of an area corresponding to the estimated sound source direction from the first image signal, and an image-combining part that changes a third image signal of an area other than the area for the second image signal and combines the third image signal with the second image signal.
    Type: Grant
    Filed: August 24, 2015
    Date of Patent: March 14, 2017
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Takeshi Mizumoto, Kazuhiro Nakadai
  • Patent number: 9570062
    Abstract: The present invention discloses a method and device for self-adaptively eliminating noises. Said method comprises: filtering the signal received by a first microphone using a first filter, filtering the signal received by a second microphone using a second filter, and obtaining a signal with noises reduced by subtracting the filtered signals; wherein, in a noise segment, the coefficients of the first filter the second filter are updated respectively using the signal with noises reduced such that the noise component contained in the signal filtered by the first filter tends to be the same with the noise component contained in the signal filtered by the second filter; and in a noisy voice segment, the coefficients of the first filter and the second filter are remained unchanged respectively, the first filter and the second filter respectively use a coefficient updated in the noise segment last time to filter the signals received by the first microphone and the second microphone.
    Type: Grant
    Filed: September 2, 2013
    Date of Patent: February 14, 2017
    Assignee: GOERTEK INC
    Inventors: Fengliang Wu, Zhenhua Zhi
  • Patent number: 9571930
    Abstract: Various techniques for detecting are described herein. In one example, a method includes detecting a position of a computing device and selecting a plurality of microphones to detect audio data based on the position of the computing device. The method can also include calculating location data corresponding to the audio data, the location data indicating the location of a user and modifying a far field gain value based on the location data.
    Type: Grant
    Filed: December 24, 2013
    Date of Patent: February 14, 2017
    Assignee: Intel Corporation
    Inventors: T V Rama Mohan Gupta, Gangatharan Jothiswaran, Prasanna Krishnaswamy
  • Patent number: 9560322
    Abstract: A device having built-in digital data means is powered by an unlimited power source for a lamp-holder, LED bulb, or light device connected to unlimited power source by prongs or a base that can be inserted into a socket that would otherwise receiving a bulb. The device may take the form of a webcam having auto tracking functions and retractable prongs that plug directly into a wall outlet.
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: January 31, 2017
    Inventor: Tseng-Lu Chien
  • Patent number: 9557400
    Abstract: A system and method for tracking and tracing motions of multiple incoherent sound sources and for visualizing the resultant overall sound pressure distribution in 3D space in real time are developed. This new system needs only four microphones (although more could be used) that can be mounted at any position so long as they are not placed on the same plane. A sample configuration is to mount three microphones on the y, z plane, while the 4th microphone on a plane perpendicular to the y, z plane. A processor receives signals from the microphones based on the signals received from noise sources in unknown locations, and the processor determines the locations of these sources and visualizes the resultant sound field in 3D space in real time. This system works for broadband, narrowband, tonal sound signals under transient and stationary conditions.
    Type: Grant
    Filed: April 26, 2010
    Date of Patent: January 31, 2017
    Assignee: WAYNE STATE UNIVERSITY
    Inventor: Sean F. Wu
  • Patent number: 9552840
    Abstract: A method for audio signal processing is described. The method includes decomposing a recorded auditory scene into a first category of localizable sources and a second category of ambient sound. The method also includes recording an indication of the directions of each of the localizable sources. The method may be performed with a device having a microphone array.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: January 24, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Lae-Hoon Kim, Erik Visser, Pei Xiang, Ian Ernan Liu, Dinesh Ramakrishnan
  • Patent number: 9549271
    Abstract: Disclosed are a device and a method for tracking a sound source location by removing wind noise. The disclosed method for tracking a sound source by removing wind noise comprises the steps of: performing a Fourier transform for input signals of a time domain received by a plurality of microphones; detecting a first sound source section on the basis of an average power value of the Fourier-transformed input signals; detecting a second sound source section from which wind noise has been removed, on the basis of the first sound source section and a difference of power values of the input signals received by the microphones; and detecting a location of a sound source on the basis of the second sound source section and a phase difference of the input signals received by the plurality of microphones.
    Type: Grant
    Filed: December 27, 2013
    Date of Patent: January 17, 2017
    Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Jong Suk Choi, Van Quang Nguyen
  • Patent number: 9542603
    Abstract: A videoconferencing endpoint includes at least one processor a number of microphones and at least one camera. The endpoint can receive audio information and visual motion information during a teleconferencing session. The audio information includes one or more angles with respect to the microphone from a location of a teleconferencing session. The audio information is evaluated automatically to determine at least one candidate angle corresponding to a possible location of an active talker. The candidate angle can be analyzed further with respect to the motion information to determine whether the candidate angle correctly corresponds to person who is speaking during the teleconferencing session.
    Type: Grant
    Filed: November 17, 2015
    Date of Patent: January 10, 2017
    Assignee: Polycom, Inc.
    Inventor: Jinwei Feng
  • Patent number: 9544672
    Abstract: Embodiments of the present invention provide a condenser microphone with a movable lining and a fixed lining. The movable lining and the fixed lining are respectively connected to a power supply and an amplifier. The movable lining includes graphene (G), formed at least as one graphene layer, while the fixed pad is formed as a fixed plate.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: January 10, 2017
    Inventor: Piotr Nawrocki
  • Patent number: 9538289
    Abstract: An apparatus comprising at least one processor and at least one memory including computer program code the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform processing at least one control parameter dependent on at least one sensor input parameter, processing at least one audio signal dependent on the processed at least one control parameter, and outputting the processed at least one audio signal.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: January 3, 2017
    Assignee: Nokia Technologies Oy
    Inventors: Asta M. Karkkainen, Jussi Virolainen
  • Patent number: 9530407
    Abstract: Methods, systems, and computer-readable and executable instructions for spatial audio database based noise discrimination are described herein. For example, one or more embodiments include comparing a sound received from a plurality of microphones to a spatial audio database, discriminating a speech command and a background noise from the received sound based on the comparison to the spatial audio database, and determining an instruction based on the discriminated speech command.
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: December 27, 2016
    Assignee: Honeywell International Inc.
    Inventors: SrinivasaRao Katuri, Soumitri N. Kolavennu, Amit Kulkarni
  • Patent number: 9532134
    Abstract: A sound pickup apparatus, which can control directionality and has a simple structure, and in which a plurality of microphones can be provided so as to be floated by using the small number of parts, is provided. Three support columns 13A to 13C having the same length are provided upright on a top surface of a housing 11 of a sound pickup apparatus 1. The support columns 13A to 13C are equidistantly arranged away from a center position of the housing 11 and equally spaced 120 degrees apart from each other. A frame 4 having microphone frames 14A to 14C in which microphones are fitted is arranged above the top surface of the housing 11. In addition, the microphone frames 14A to 14C are coupled to the support columns 13A to 13C of the housing 11 by elastic rubbers 15A to 15C in a state where tensile stress passes the center of the housing 11 and is generated in an outward direction.
    Type: Grant
    Filed: February 10, 2010
    Date of Patent: December 27, 2016
    Assignee: YAMAHA CORPORATION
    Inventors: Seiichiro Hosoe, Yuichiro Suenaga, Satoshi Ukai, Ryo Oouchi
  • Patent number: 9532149
    Abstract: A method of noise suppression in a hearing aid system by providing an improved noise estimate derived from the difference of a first digital audio signal provided by a first input transducer and an adaptively filtered second digital audio signal provided by a second input transducer. The invention further provides a hearing aid (100, 200) and a hearing aid system (300 and 400) adapted for improving noise suppression in accordance with this method.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: December 27, 2016
    Assignee: Widex A/S
    Inventors: Thomas Bo Elmedyb, Kristian Timm Andersen
  • Patent number: 9525938
    Abstract: An audio device may use the audio detected at two opposite facing, front and rear omnidirectional microphones to determine the angular directional location of a user's voice while the device in speaker mode or audio command input mode. The angular directional location may be determined to be at front, side and rear locations of the device during the period of time by calculating an energy ratio of audio signals output by the front and rear microphones during the period. Comparing the ratio to experimental data for sound received from different directions around the device may provide the location of the user's voice. Based on the determination, audio beamforming input settings may be adjusted for user voice beamforming. As a result, the device can perform better beamforming to combine the signals captured by the microphones and generate a single output that isolates the user's voice from background noise.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: December 20, 2016
    Assignee: Apple Inc.
    Inventors: Ashrith Deshpande, Andrew P. Bright
  • Patent number: 9525926
    Abstract: An acoustic camera for using a MEMS microphone array comprises: an acoustic sensor apparatus (30) comprising a print circuit board (20) on which the plural of MEMS microphone (10) are mounted, to send signals for the detected sound to a data collection unit (40); a data collection unit (40) connected to the acoustic sensor apparatus (30), which samples analog signals related to sound transmitted from the acoustic sensor apparatus (30) to transform into digital signals and transmit them to the central processing unit (40); a central processing unit (50) connected to the data collection unit (40), which calculates noise level based on digital signals related to sound transmitted from the data collection unit (40); and a display unit (60) which is connected to the central processing unit (50), which displays in color the noise level calculated at the central processing unit.
    Type: Grant
    Filed: August 19, 2011
    Date of Patent: December 20, 2016
    Assignee: SM INSTRUMENT CO., LTD.
    Inventors: Young-Gi Kim, Kang-Hyun Lee, Jun-Goo Kang
  • Patent number: 9521482
    Abstract: A sound receiving device includes a microphone array, a plurality of time delay circuits and a sound-mixing output device. The microphone array includes a plurality of microphones longitudinally arranged along a straight line in order, an output terminal of each microphone is connected with a time delay circuit, and an output terminal of the time delay circuit is connected to an input terminal of the sound-mixing output device; and an i-th time delay circuit has a delay time Ti defined by adding a (n?i) times of unit time to a delay time of a last time delay circuit. The device can increase the output of the forward acoustic wave actuation, decrease the output of the oblique acoustic wave within a certain frequency bandwidth, and obtain nearly the same directional characteristic at the central frequency and adjacent frequencies.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: December 13, 2016
    Assignee: GUANGZHOU RUIFENG AUDIO TECHNOLOGY CORPORATION LTD.
    Inventors: Bingqi Hu, Yizhen Wang
  • Patent number: 9510123
    Abstract: A method for source selective real-time monitoring and mapping of environmental noise, comprising the steps of ? identifying sources in the area; ? designing places for the monitoring stations; ? creating a data collecting and data processing center; ? measuring the noise impact, and observation of the sources with the sensors; ? defining the noise propagation; ? assemblying the monitoring stations including a sound measuring device, a computing unit and a communication unit; ? determining the resultant noise impact prevailing in the respective measurement points; ? determining the sources dominant in the individual moments on the basis of the data of the sensors; ? determining the average noise impact of the respective sources for a longer period; ? obtaining an average noise impact; ? extending the measurement into a noise impact map; ? calculating the effective noise impact of every noise source in every point of the area for every period; ? producing the effective noise impact map of the respective period
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: November 29, 2016
    Inventor: Gabor Gereb
  • Patent number: 9510095
    Abstract: The present invention relates to a sound emitting and collecting apparatus including a sound collecting portion that captures surrounding sound using two microphones, and a sound emitting portion that emits sound from at least one speaker. The apparatus includes a sound source separating portion that extracts a target sound from a sound source in a predetermined direction, based on an input sound signal obtained by capturing surrounding sound using the two microphones, and an emission non-target sound removing portion that removes a non-target sound that is emitted from the speaker and captured by each of the microphones, based on sound source data for the sound emitting portion. The emission non-target sound removing portion is provided on a path that reaches the sound source separating portion. The emission non-target sound removing portion has a structure similar to an acoustic echo canceller, for example.
    Type: Grant
    Filed: May 7, 2014
    Date of Patent: November 29, 2016
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Katsuyuki Takahashi
  • Patent number: 9510090
    Abstract: A portable voice capture device having an orientable arm comprising a first leg and a second leg, the first leg and the second leg having different orientations, the first leg of the first arm comprising a first differential linear array of microphones, a directivity of the first differential linear array being arranged for improved sensing of voice from a user, the second leg of the arm comprising a second differential linear array of microphones, a directivity of the second differential linear array being arranged for improved sensing of noise from a different than the direction of said sensed voice, and a noise reduction circuit for providing a voice signal with reduced noise, based on the output of the first array and on the output of the second array.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: November 29, 2016
    Assignee: VEOVOX SA
    Inventors: Herve Lissek, Philippe Martin, Jorge Carmona, Michel Imhasly, Ian Millar, Xavier Falourd, Patrick Marmaroli, Gilbert Maitre
  • Patent number: 9510098
    Abstract: A method for recording and reconstructing a three-dimensional (3D) sound field, wherein a microphone array is established in a 3D sound field to track and locate sound sources in the 3D sound field and retrieve corresponding sound source signals. A plurality of control points is established inside an area where the 3D sound field is to be reconstructed. The control points are used to establish relational expressions of the sound source signals, the 3D sound field, a reconstructed sound field, and reconstructed sound source signals. The reconstructed sound source signals are obtained via solving the relational expressions and input into a speaker array arranged outside the area to establish the reconstructed sound field in the area. The present invention truly records the 3D sound field without using any extra transformation process and replays the reconstructed sound field with a larger sweet spot in higher fidelity.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: November 29, 2016
    Assignee: NATIONAL TSING HUA UNIVERSITY
    Inventors: Mingsian R. Bai, Yi-Hsin Hua
  • Patent number: 9503814
    Abstract: An the acoustic apparatus comprising a first MEMS motor that includes a first diaphragm and a first back plate, and a second MEMS motor that includes a second diaphragm and a second back plate. The first motor is biased with a first electrical polarity and a second motor is biased with a second electrical polarity such that the first electrical polarity and the second electrical polarity are opposite. At the first motor, a first signal is created that is representative of received sound energy. At the second motor, a second signal is created that is representative of the received sound energy. A differential output signal that is the representative of the difference between the first signal and the second signal is obtained. In obtaining the differential output signal, common mode noise between the first motor and the second motor is rejected.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: November 22, 2016
    Assignee: Knowles Electronics, LLC
    Inventors: Jordan T. Schultz, Weiwen Dai, Peter Van Kessel
  • Patent number: 9502021
    Abstract: Provided are methods and systems for spatially selecting acoustic sources using a post-processor that consists of a selection of one postfilter from a set of postfilters, or a cascade of postfilters, where each postfilter is optimal for a particular scenario. Each postfilter individually is based on optimizing the gain for each time-frequency bin based on knowledge of (i) a spatial covariance matrix for the desired source, (ii) a spatial covariance matrix for the interfering sources, and (iii) microphone signals in some neighborhood of the current time-frequency bin.
    Type: Grant
    Filed: October 9, 2014
    Date of Patent: November 22, 2016
    Assignee: Google Inc.
    Inventor: Willem Bastiaan Kleijn
  • Patent number: 9503818
    Abstract: Spherical microphone arrays capture a three-dimensional sound field (P(?ct)) for generating an Ambisonics representation (Anm(t)), where the pressure distribution on the surface of the sphere is sampled by the capsules of the array. The impact of the microphones on the captured sound field is removed using the inverse microphone transfer function. The equalization of the transfer function of the microphone array is a big problem because the reciprocal of the transfer function causes high gains for small values in the transfer function and these small values are affected by transducer noise. The present principles minimize that noise by using a Wiener filter processing (34) in the frequency domain, which processing is automatically controlled (33) per wave number by the signal-to-noise ratio of the microphone array.
    Type: Grant
    Filed: October 31, 2012
    Date of Patent: November 22, 2016
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Sven Kordon, Johann-Markus Batke, Alexander Krueger
  • Patent number: 9503809
    Abstract: A beam-forming device includes a first target sound blocker 103 and a second target sound blocker 104 that remove a target signal having a correlation mutually from a first sound signal x1 and a second sound signal x2 which are converted by first and second microphones 101 and 102, a phase synchronizer 105 that synchronizes the phases of the first sound signal x1 and the second sound signal x2 and synthesizes these sound signals by using information acquired when the first target sound blocker 103 removes the target signal, and a noise learner 106 that learns a noise component included in an output signal of the phase synchronizer 105 from signals from which the target signal is removed by the first target sound blocker 103 and the second target sound blocker 104.
    Type: Grant
    Filed: August 6, 2012
    Date of Patent: November 22, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takashi Mikami, Tomoharu Awano
  • Patent number: 9491543
    Abstract: A device and a method to improve quality of a signal in a lossy communication system are disclosed. One or more samples of the signal are received from a first and second microphone transducers. The received samples are processed and filtered to obtain a processed signal. A voice activity detector is provided for iteratively identifying speech regions and non-speech regions of the signal. All samples received by the microphones are continuously monitored and quality of each sample is improved by reducing or eliminating the noise detected in the non-speech regions of the processed signal.
    Type: Grant
    Filed: February 9, 2015
    Date of Patent: November 8, 2016
    Inventor: Alon Konchitsky
  • Patent number: 9485571
    Abstract: A method of manufacturing a microphone, a microphone, and a method of controlling the microphone are provided. The method includes forming a sound sensing module on a mainboard having a first sound aperture, to be connected with the first sound aperature and forming a cover having a second sound aperature that corresponds to the first sound aperature, mounted on the mainboard, and housing the sound sensing module. A first and second sound delay filters are formed in a space defined by the cover, to be connected with the second sound hole and thermal actuators are disposed at both sides of the first sound delay filter and move the first sound delay filter based on whether power is supplied. A semiconductor chip is electrically connected with the sound sensing module in the space and selectively operates the thermal actuators in response to signals from the sound sensing module.
    Type: Grant
    Filed: July 14, 2015
    Date of Patent: November 1, 2016
    Assignee: Hyundai Motor Company
    Inventor: Ilseon Yoo
  • Patent number: 9479885
    Abstract: Configuring an adaptive microphone array to gather signals from a main lobe of the array, and configuring the array to reduce side interference gathered from sources that are not situated within the main lobe. A memory stores test signals gathered by the array at a plurality of predetermined angular bearings with reference to the array in an anechoic chamber. Signals gathered in real time are processed to provide a preliminary output and preliminary weights. The test signals are retrieved from memory. The preliminary weights are applied to the test signals to provide null steering weights. The null steering weights and the preliminary output are processed to reduce or minimize the amplitude response of the array at the angular orientation.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: October 25, 2016
    Assignee: Motorola Mobility LLC
    Inventors: Plamen A Ivanov, Joel Clark
  • Patent number: 9479867
    Abstract: A device is configured for identifying a direction of a sound. The device includes a controller comprising circuitry. The circuitry is configured to receive a first output from a first input device and a second output from a second input device. The circuitry is also configured to add a delay to the second output. The circuitry is also configured to compare the first output to the delayed second output in a plurality of directions to form a comparison. The circuitry is also configured to identify a number of null directions of the plurality of directions where a set of nulls exists based on the comparison.
    Type: Grant
    Filed: July 3, 2014
    Date of Patent: October 25, 2016
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Yunhong Li
  • Patent number: 9473868
    Abstract: A sound collecting system includes a plurality of microphones, a distance estimation module and an adjustment module. The distance estimation module estimates a distance to a user to accordingly provide a user distance. The adjustment module adjusts a part or all of the positions of the microphones according to the user distance.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: October 18, 2016
    Assignee: MStar Semiconductor, Inc.
    Inventors: Hung-Chi Huang, Cheng-Lun Hu
  • Patent number: 9462380
    Abstract: A microphone array system for sound acquisition from multiple sound sources in a reception space surrounding a microphone array that is interfaced with a beamformer module is disclosed. The microphone array includes microphone transducers that are arranged relative to each other in N-fold rotationally symmetry, and the beamformer includes beamformer weights that are associated with one of a plurality of spatial reception sectors corresponding to the N-fold rotational symmetry of the microphone array. Microphone indexes of the microphone transducers are arithmetically displaceable angularly about the vertical axis during a process cycle, so that a same set of beamformer weights is used selectively for calculating a beamformer output signal associated with any one of the spatial reception sectors. A sound source location module is also disclosed that includes a modified steered power response sound source location method. A post filter module for a microphone array system is also disclosed.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: October 4, 2016
    Assignee: Biamp Systems Corporation
    Inventor: Iain Alexander McCowan
  • Patent number: 9456275
    Abstract: An acoustic system includes first one or mole acoustic elements designed and arranged in a first manner to facilitate generation of a first signal that includes mostly undesired audio, substantially void of desired audio, in response to a presence of the desired audio and the undesired audio. Second one or more acoustic elements are designed and arranged in a second complementary manner to facilitate generation of a second signal that includes both the desired and the undesired audio, in response to the presence of the desired audio and the undesired audio. A signal extraction component receives the first signal and the second signal. The signal extraction component further includes an inhibit component. The inhibit component is coupled to the first signal and the second signal. A delay element is coupled to a path of the second signal. The delay element introduces a deterministic delay to the second signal.
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: September 27, 2016
    Assignee: KOPIN CORPORATION
    Inventor: Dashen Fan
  • Patent number: 9445198
    Abstract: A microphone array-based audio system that supports representations of auditory scenes using second-order (or higher) harmonic expansions based on the audio signals generated by the microphone array. In one embodiment, a plurality of audio sensors are mounted on the surface of an acoustically rigid polyhedron that approximates a sphere. The number and location of the audio sensors on the polyhedron are designed to enable the audio signals generated by those sensors to be decomposed into a set of eigenbeams having at least one eigenbeam of order two (or higher). Beamforming (e.g., steering, weighting, and summing) can then be applied to the resulting eigenbeam outputs to generate one or more channels of audio signals that can be utilized to accurately render an auditory scene.
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: September 13, 2016
    Assignee: MH Acoustics LLC
    Inventors: Gary W. Elko, Jens M. Meyer
  • Patent number: 9443532
    Abstract: Systems and methods of improved noise reduction using direction of arrival information include: receiving audio signals from two or more acoustic sensors; applying a beamformer module to the audio signals to employ a first noise cancellation algorithm to the audio signals and combine the audio signals into an audio signal; applying a noise reduction post-filter module to the audio signal, the application of which includes: estimating a current noise spectrum of the audio signals after the application of the first noise cancellation algorithm; using spatial information derived from the audio signals received from the two or more acoustic sensors to determine a measured direction-of-arrival by estimating the current time-delay between the acoustic sensor inputs; comparing the measured direction-of-arrival to a target direction-of-arrival; applying a second noise reduction algorithm to the audio signal; and outputting a single audio stream with reduced background noise.
    Type: Grant
    Filed: July 23, 2013
    Date of Patent: September 13, 2016
    Assignee: QSOUND LABS, INC.
    Inventor: David Giesbrecht
  • Patent number: 9426553
    Abstract: A microphone array arrangement structure in a vehicle cabin is provided with multiple microphones arranged in a convex line. The microphones include a first microphone, and the direction of the axis of the first microphone faces the mouth of the driver. The microphone array arrangement structure is provided with covers housing the microphones and having multiple holes. The front surface of the covers form a convexly curved line, and each of the microphones is fixed inside of a cover to correspond to one of the holes.
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: August 23, 2016
    Assignee: HONDA ACCESS CORP.
    Inventors: Shiro Iwai, Kazuhiro Nakadai, Hiroshi Tsujino
  • Patent number: 9424860
    Abstract: A noise reduction system includes multiple transducers that generate time domain signals. A transforming device transforms the time domain signals into frequency domain signals. A signal mixing device mixes the frequency domain signals according to a mixing ratio. Frequency domain signals are rotated in phase to generate phase rotated signals. A post-processing device attenuates portions of the output based on coherence levels of the signals.
    Type: Grant
    Filed: June 21, 2013
    Date of Patent: August 23, 2016
    Assignee: 2236008 Ontario Inc.
    Inventor: Phillip A. Hetherington