Feedback Suppression Patents (Class 381/318)
  • Patent number: 10805739
    Abstract: A hearing device configured to be fitted at or in a user's ear canal including an acoustic vent configured to enable sound waves to pass through the hearing device. A directional microphone is configured to create an output signal by amplifying sound traveling in a first direction through the acoustic vent toward the ear canal and attenuating sound traveling in a second direction through the acoustic vent from the ear canal. A receiver is configured to produce sound in response to the output signal. A method of operating a hearing device is also included.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: October 13, 2020
    Assignee: Bose Corporation
    Inventor: Walter Paul Sjursen
  • Patent number: 10751524
    Abstract: Presented herein are techniques for suppressing electrical interference caused by a feedback path(s) between an output channel and an input channel of an implantable medical device. In particular, the output channel carries stimulation signals that can pass through the feedback path(s) and appear in the input channel, thereby causing interference with any input signals carried by the input channel. The implantable medical device is configured to determine characteristics of the feedback and subsequently use the feedback characteristics to generate feedback compensation signals for application to the input channel.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: August 25, 2020
    Assignee: COCHLEAR LIMITED
    Inventors: Oliver Ridler, Adam Hersbach
  • Patent number: 10720141
    Abstract: An in-ear device includes a housing shaped to hold the in-ear device in an ear, and an audio package, disposed in the housing, to emit sound. A tympanic membrane measurement unit (TMMU) is structured to measure a movement of a tympanic membrane in the ear caused by external sound received by the tympanic membrane, and a controller is coupled to the audio package and the TMMU. The controller includes logic that when executed by the controller causes the in-ear device to perform operations. The operations include measuring a movement of the tympanic membrane, and in response to measuring the movement of the tympanic membrane, outputting sound from the audio package to destructively interfere with the external sound received by the tympanic membrane.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: July 21, 2020
    Assignee: X Development LLC
    Inventors: Jason Rugolo, Cyrus Behroozi, Benoit Schillings
  • Patent number: 10701496
    Abstract: A hearing aid (1) comprises a flexible ear tip (9) for an ear piece (8) adapted for insertion into the ear canal of a user. The ear piece comprises a shroud having a generally ball-shaped hollow bulb made of soft resilient material, featuring a mid zone that is adapted for being softer to compression by the contact with ear canal wall than is the case with the end zones. The invention further provides an ear piece, an ear plug, and a component for a communications device.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: June 30, 2020
    Assignee: Widex A/S
    Inventors: Ib Marcher, Kasper Holkved Rasmussen
  • Patent number: 10687153
    Abstract: The present disclosure pertains to hearing devices configurable between open fit and closed fit configurations at different times through actuation of one or more acoustic valves located in one or more corresponding sound passages of the hearing device. The one or more acoustic valves of the hearing device are adaptively controlled based on context detected by one or more sensors. The context may be, but is not limited to, a mode of operation of the hearing devices which may include, for example, an audio content playback mode and a voice communication mode. The actuatable valves may be actuatable in situ without having to remove the hearing device from the user's ear thereby enabling the user to experience the benefit of a closed fit or an open fit depending on the user's desire or other context.
    Type: Grant
    Filed: December 30, 2018
    Date of Patent: June 16, 2020
    Assignee: Knowles Electronics, LLC
    Inventors: Shehab Albahri, Christopher Monti, Thomas Miller, Charles King, Christopher Jones, Brenno Varanda, Erik Wiederholtz
  • Patent number: 10659891
    Abstract: A hearing device, e.g. a hearing aid, comprises a forward path for processing an electric signal representing sound including a) an input unit for receiving or providing an electric input signal representing sound, b) a signal processing unit, c) an output transducer for generating stimuli perceivable as sound to a user, d) a feedback detection unit configured to detect feedback or evaluate a risk of feedback via an acoustic or mechanical or electrical feedback path from said output transducer to said input unit and comprising d1) a magnitude and phase analysis unit for repeatedly determining magnitude, Mag, and phase, Phase, of said electric input signal and further parameters based thereon, and d2) a feedback conditions and detection unit configured to check criteria for magnitude and phase feedback condition, respectively, based on said values, and to provide a feedback detection signal indicative of feedback or a risk of feedback.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: May 19, 2020
    Assignee: Oticon A/S
    Inventors: Martin Kuriger, Bernhard Kuenzle, Meng Guo
  • Patent number: 10616692
    Abstract: An audio system includes a transducer assembly, an optical sensing pathway, a laser, a detector assembly, and a controller. The transducer assembly is coupled to a user's ear and produces an acoustic pressure wave based on an audio instruction. The optical sensing pathway moves, at least in part, with a detected acoustic pressure wave. The laser emits light that is separated into a reference beam and a sensing beam that is coupled into the optical sensing pathway. The detected acoustic pressure wave interacts with the sensing beam to alter its optical path length. The detector assembly detects the reference and sensing beams from the optical sensing pathway, and measures the detected acoustic pressure wave based on changes in optical path length between the reference beam and the sensing beam. The controller adjusts the audio instruction based on the measurement of the detected acoustic pressure wave.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: April 7, 2020
    Assignee: Facebook Technologies, LLC
    Inventor: Morteza Khaleghimeybodi
  • Patent number: 10616685
    Abstract: A hearing device includes: a first input transducer configured to convert an acoustic signal into a first input signal; a processing unit configured to provide a processed signal based on the first input signal; an acoustic output transducer configured to provide an audio output signal of based on the processed signal; a second input transducer configured to provide a second input signal based at least on the audio output signal from the acoustic output transducer and a body-conducted voice signal from a user of the hearing device; and a user voice extraction unit connected to the processing unit for receiving the processed signal, and connected to the second input transducer for receiving the second input signal, wherein the user voice extraction unit is configured to extract a voice signal based at least on the second input signal and the processed signal.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: April 7, 2020
    Assignee: GN HEARING A/S
    Inventors: Tobias Piechowiak, Erik Cornelis Diederik Van Der Werf, Jonathan Boley
  • Patent number: 10602282
    Abstract: A hearing aid includes a signal processor, a input transducer electrically connected to the signal processor, a receiver electrically connected to the signal processor, an adaptive feedback cancellation filter configured to suppress feedback from a signal path between the receiver and the input transducer, and a feedback gain correction unit configured for adjusting a gain parameter of the signal processor based at least in part on coefficients of the adaptive feedback cancellation filter. A method of adjusting a gain parameter of a signal processor of a hearing aid includes monitoring filter coefficients of a feedback cancellation filter of the hearing aid, and adjusting the gain parameter of the signal processor in dependence of the monitored filter coefficients.
    Type: Grant
    Filed: January 13, 2009
    Date of Patent: March 24, 2020
    Assignee: GN Resound A/S
    Inventor: Erik Cornelis Diederik Van Der Werf
  • Patent number: 10536787
    Abstract: In one example, a method includes determining, by one or more processors of a hearing aid programmer, values for one or more properties of a first hearing aid; obtaining, by the one or more processors, based on feedback cancelation configurations of a plurality of other hearing aids having the same values for the one or more properties as the first hearing aid, a predicted initial feedback cancelation configuration for the first hearing aid; and programming, by the one or more processors, the first hearing aid based on the predicted initial feedback cancelation configuration.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: January 14, 2020
    Assignee: Starkey Laboratories, Inc.
    Inventors: Joyce Rosenthal, Ivo Merks
  • Patent number: 10499165
    Abstract: A digital signal processor processes acoustic sound in a body-worn hearing assist device including separating the microphone signal into frequency bands. Two of the frequency bands, which are preferably adjacent, are considered as a pair. In one of the frequency bands in the pair, the band signal is replicated/split into two subsignals. One of the subsignals is frequency shifted into the other frequency band of the pair. The input signal from the paired frequency band is either significantly attenuated or altogether discarded. The unshifted subsignal is attenuated relative to the frequency-shifted subsignal, which is preferably amplified, before both subsignals are combined as part of the acoustic output. Considering both frequency bands as a pair, the likelihood of feedback is significantly reduced or eliminated.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: December 3, 2019
    Assignee: IntriCon Corporation
    Inventor: Robert J. Fretz
  • Patent number: 10425746
    Abstract: A hearing apparatus has a microphone for converting ambient sounds into a microphone signal, a signal processor for processing the microphone signal and an output transducer for outputting an output signal. A characteristic voice measure is ascertained for a voice component in the ambient sounds, and a supplementary measure characteristic of an activity of the wearer of the hearing apparatus is ascertained. Subsequently, an evaluated correlation between the voice measure and the supplementary measure is used to increase a probability value for the presence of a communication situation between the user and a third party if the voice measure and the supplementary measure, under at least one prescribed criterion, assume a value representative of the presence of the voice component and of the activity of the wearer. The probability value forms the basis for altering a signal processing algorithm that is executed to process the microphone signal.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: September 24, 2019
    Assignee: Sivantos Pte. Ltd.
    Inventors: Marc Aubreville, Marko Lugger, Homayoun Kamkar-Parsi
  • Patent number: 10397712
    Abstract: A method for the frequency distortion of an audio signal includes splitting the audio signal into a plurality of specified frequency bands, in which a band limit frequency is defined in each case by two respective immediately adjacent frequency bands. A first frequency band and a second frequency band lying immediately above the first frequency band are determined on the basis of the audio signal. A distortion of the frequencies differing from the distortion applied to signal components in the second frequency band is applied to signal components in the first frequency band, and a frequency-distorted signal is generated as a result. A method for suppressing an acoustic feedback in an acoustic system and a hearing aid are also provided.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: August 27, 2019
    Assignee: Sivantos Pte. Ltd.
    Inventors: Tobias Daniel Rosenkranz, Tobias Wurzbacher
  • Patent number: 10374664
    Abstract: A method for reporting an aperiodic channel condition in a wireless communication system, according to an embodiment of the present invention, is performed by a terminal. The method comprises the steps of: receiving, from a base station, setting for one or more channel state information (CSI) processes including a plurality of channel state information-reference signals (CSI-RS) resources, wherein precoding is applied to each of the plurality of CSI-RS resources; receiving an aperiodic CSI report request from the base station; and transmitting, to the base station, an aperiodic CSI for a CSI process indicated by the aperiodic CSI report request, wherein, if a certain time has not elapsed after a CSI-RS resource index for the CSI process indicated by the aperiodic CSI report request is reported, the transmitted aperiodic CSI may include a CSI-RS resource index for a CSI process which has not been updated.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: August 6, 2019
    Assignee: LG ELECTRONICS INC.
    Inventors: Kunil Yum, Jonghyun Park, Kijun Kim
  • Patent number: 10334371
    Abstract: A method and an apparatus reduce feedback in a hearing aid device. The method includes the step of acquiring a first feedback transfer function at a first point in time on a feedback path from a signal processing device via an electro-acoustic transducer, an acoustic signal path from the electro-acoustic transducer to an acousto-electric transducer and via the acousto-electric transducer back to the signal processing device. In a further step, a weighted mean value function is determined in a manner dependent on amplitude absolute values of the first feedback transfer function. A second feedback transfer function is estimated by an adaptive filter, wherein coefficients of the adaptive filter are determined in a manner dependent on the weighted mean value function. The adaptive filter is applied to a signal which is derived from an acoustic input signal of the acousto-electric transducer.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: June 25, 2019
    Assignee: Sivantos Pte. Ltd.
    Inventors: Henning Puder, Tobias Daniel Rosenkranz, Tobias Wurzbacher
  • Patent number: 10313778
    Abstract: A method for operating an electro-acoustic system (11) arranges an electro-acoustic device (10), for occluding an ear canal on an ear and uses a signal processing device (16) for processing a signal incoming at the device (10). A correction unit (17) of the signal processing device (16) modifies the signal incoming at the device (10). To reduce, to avoid or to compensate for an interfering or undesired change in a perception of ambient noises during the use of an electro-acoustic device occluding the ear canal, with the correction unit (17), a signal outgoing from the device (10) is generated in order to achieve acoustic transparency, in which, on the basis of the outgoing signal, a received signal is generated at the eardrum which is adapted so as to correspond to a free-ear received signal at the eardrum in the case of a free ear canal without the device (10).
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: June 4, 2019
    Assignee: Carl von Ossietzky Universität Oldenburg
    Inventors: Stephan Ernst, Marko Hiipakka, Birger Kollmeier, Florian Denk
  • Patent number: 10306377
    Abstract: A method including operating an adaptive system of a hearing prosthesis, and determining one or more feedback path parameters of the hearing prosthesis based on the operation of the adaptive system of the hearing prosthesis, wherein the action of determining one or more feedback path parameters includes determining the one or more feedback path parameters based on data based on adaptive filter coefficients of adaptive filters of the adaptive system.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: May 28, 2019
    Assignee: Cochlear Limited
    Inventors: Martin Evert Gustaf Hillbratt, Mats Höjlund
  • Patent number: 10271148
    Abstract: A method of modelling a feedback path from a receiver to a microphone in a hearing device, includes: transmitting an electronic probe signal to the receiver; obtaining a microphone output signal that is associated with an output of the receiver; and determining at least one parameter of the feedback path based on the microphone output signal; wherein the electronic probe signal comprises a first signal level, followed by a second signal level that is less than the first signal level, the second signal level being greater than zero.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: April 23, 2019
    Assignee: GN Hearing A/S
    Inventor: Shawn Perman
  • Patent number: 10244306
    Abstract: Audio systems and methods are provided that detect instability in active feedback noise reduction circuitry. An acoustic transducer converts a driver signal into an acoustic signal, and a microphone provides a feedback signal. The feedback signal is processed, through a first transfer function, to provide an anti-noise signal. The driver signal is based at least in part upon the anti-noise signal, to reduce acoustic noise in the environment of the acoustic transducer. The driver signal is also filtered by a filter having a second transfer function that is inverse of the first transfer function, to provide a reference signal. The feedback signal is compared to the reference signal to determine a feedback instability, based upon the comparison.
    Type: Grant
    Filed: May 24, 2018
    Date of Patent: March 26, 2019
    Assignee: Bose Corporation
    Inventors: Emery M. Ku, David J. Warkentin
  • Patent number: 10199047
    Abstract: Systems and methods for processing an audio signal are provided for replay on an audio device. An audio signal is spectrally decomposed into a plurality of subband signals using and pass filters. Each of the subband signals are provided to a respective modulator and subsequently, from the modulator output, provided to a respective first processing path that includes a first dynamic range compressor, DRC. Each subband signal is feedforward compressed by the respective first DRC to obtain a feedforward-compressed subband signal, wherein the first DRC is slowed relative to an instantaneous DRC. Subsequently, each feedforward-compressed subband signal is provided to a second processing path that includes a second DRC, wherein the feedforward-compressed subband signal is compressed by the respective second DRC and outputted to the respective modulator. Modulation of the subband signals is then performed in dependence on the output of the second processing path.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: February 5, 2019
    Assignee: Mimi Hearing Technologies GmbH
    Inventor: Nicholas R. Clark
  • Patent number: 10165374
    Abstract: A method including obtaining data based on a current and/or anticipated future state of a hearing prosthesis and adjusting a set gain margin of the hearing prosthesis based on the current or anticipated future state of the hearing prosthesis.
    Type: Grant
    Filed: April 1, 2016
    Date of Patent: December 25, 2018
    Assignee: Cochlear Limited
    Inventors: Martin Hillbratt, Mark Flynn, Bjorn Davidsson
  • Patent number: 10034084
    Abstract: A voice signal processing device connected to a smart device is provided. The voice signal processing device is connected to a smart phone, a tablet computer or the like and includes a voice signal input and output function mounted thereon. The voice signal processing device returns a sound generated by the smart device or a sound generated from the exterior into the smart device as a high-quality sound and is configured to extract a voice signal from a wire coupled to the smart device and the ear receiver and configured to input the extracted voice signal into the input terminal of the microphone of the smart device. A voice signal output from the smart device is configured to be extracted and conveniently input into the smart device and loss and distortion is minimized in the process of extracting and returning the voice signal.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: July 24, 2018
    Assignee: RSUPPORT CO., LTD.
    Inventor: Hyungsu Seo
  • Patent number: 10034102
    Abstract: Disclosed herein, among other things, are apparatus and methods for annoyance perception and modeling for hearing-impaired listeners. One aspect of the present subject matter includes a method for improving noise cancellation for a wearer of a hearing assistance device having an adaptive filter. In various embodiments, the method includes calculating an annoyance measure or other perceptual measure based on a residual signal in an ear of the wearer, the wearer's hearing loss, and the wearer's preference. A spectral weighting function is estimated based on a ratio of the annoyance measure or other perceptual measure and spectral energy. The spectral weighting function is incorporated into a cost function for an update of the adaptive filter. The method includes minimizing the annoyance or other perceptual measure based cost function to achieve perceptually motivated adaptive noise cancellation, in various embodiments.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: July 24, 2018
    Assignee: Starkey Laboratories, Inc.
    Inventors: Tao Zhang, Martin McKinney, Jinjun Xiao, Srikanth Vishnubhotla, Buye Xu
  • Patent number: 10009685
    Abstract: In accordance with embodiments of the present disclosure, a method may include using an adaptive filter system to estimate a response of an electrical characteristic of a loudspeaker based on an error between a first electrical parameter of the loudspeaker and a second electrical parameter of the loudspeaker and adding a non-zero delay to the first electrical parameter relative to the second electrical parameter prior to calculation of the error such that the adaptive filter system captures a truncated non-causality of the electrical characteristic.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: June 26, 2018
    Assignee: Cirrus Logic, Inc.
    Inventors: Rong Hu, Jie Su
  • Patent number: 10008997
    Abstract: A filter generator (100) generates a filter on the basis of band information (frequency) and gain characteristics (gain value) set by a user. The filter generator (100) obtains weighting factor information on the basis of the band information selected by the user and calculates a gain difference between a gain value used in a preceding filtering process and the new gain value selected by the user. The filter generator (100) then obtains a correction gain by multiplying the weighting factor information by the gain difference and generates a filter by multiplying a coefficient of the filter used in the preceding filtering process by the correction gain.
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: June 26, 2018
    Assignee: CLARION CO., LTD.
    Inventors: Takeshi Hashimoto, Tetsuo Watanabe, Yasuhiro Fujita, Kazutomo Fukue, Takatomi Kumagai, Hideyuki Morita
  • Patent number: 9949048
    Abstract: A system and method are provided for controlling the own-voice experience of a user who talks while an earpiece is mounted to occlude an ear of the user. A vibration sensor is engaged with the user's head to sense vibrations formed by the user speaking and conducted by the user's head to the vibration sensor. A signal generator operates a speaker element, which is integrated with the earpiece, to generate sound waves in the ear canal of the user, based on the output signal of the vibration sensor. The signal generator generates the sound waves to at least partially cancel other sound waves that are generated by at least part of said vibrations entering the ear canal from surrounding bone and/or tissue. The system and method counteracts the occlusion effect and are applicable in connection with in-ear headsets, earphones, in-ear headphones, in-ear monitors, circumaural headphones, hearing aids, earplugs and earmuffs.
    Type: Grant
    Filed: November 20, 2016
    Date of Patent: April 17, 2018
    Assignee: SONY MOBILE COMMUNICATIONS INC
    Inventors: Peter Isberg, Andrej Petef, Olivier Moliner, Ola Thörn
  • Patent number: 9924266
    Abstract: Disclosed is an audio signal processing device comprising an input for receiving a noisy audio signal, a variable gain component and a noise suppression component. The noisy audio signal has a desired audio component and a noise component. The variable gain component and the noise suppression component are respectively configured to apply a gain and a noise suppression procedure to the audio signal, thereby generating a gain adjusted noise reduced audio signal. The aggressiveness of the noise suppression procedure is rapidly changed responsive to a change in the applied gain. That change is a change from a current value by an amount substantially matching the change in applied gain to a new value. The aggressiveness is then gradually returned to the current value.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: March 20, 2018
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventor: Karsten Vandborg Sorensen
  • Patent number: 9872114
    Abstract: A method and an apparatus reduce feedback in a hearing aid device. The method includes the step of acquiring a first feedback transfer function at a first point in time on a feedback path from a signal processing device via an electro-acoustic transducer, an acoustic signal path from the electro-acoustic transducer to an acousto-electric transducer and via the acousto-electric transducer back to the signal processing device. In a further step, a weighted mean value function is determined in a manner dependent on amplitude absolute values of the first feedback transfer function. A second feedback transfer function is estimated by an adaptive filter, wherein coefficients of the adaptive filter are determined in a manner dependent on the weighted mean value function. The adaptive filter is applied to a signal which is derived from an acoustic input signal of the acousto-electric transducer.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: January 16, 2018
    Assignee: Sivantos Pte. Ltd.
    Inventors: Henning Puder, Tobias Daniel Rosenkranz, Tobias Wurzbacher
  • Patent number: 9859860
    Abstract: The utility model provides a compressor system with an equalizer (EQ). The compressor system includes a signal input device in signal communication with the EQ and a compressor. The compressor system further includes a signal output device in signal communication with the compressor. The compressor includes a signal detection module. In the system, an electrical level threshold of a full-band audio signal is setup in the compressor, and the value of electrical level of the input signal is detected by the signal detection module. After comparison of electrical level threshold and the value of electrical level, the system determines whether the compressor is activated or deactivated. The system can achieve the technology effect of effectively compressing and limiting the audio signal of a different frequency.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: January 2, 2018
    Assignee: PREMIUM LOUDSPEAKERS (HUI ZHOU) CO., LTD.
    Inventor: Xiang Feng Jin
  • Patent number: 9826319
    Abstract: A hearing device, e.g. a hearing aid, is provided, comprising a forward path comprising an input transducer for providing an electric input signal, a signal processing unit configured to apply a requested forward gain to the electric input signal, and an output transducer. The hearing device further comprises a feedback reduction unit for reducing a risk of howl due to feedback from the output transducer to the input transducer. The forward path and the external feedback path defines a roundtrip loop delay. The feedback reduction unit is configured to modulate said requested forward gain in time, to provide that the resulting forward gain exhibits a first, increased gain AH in a first time period TH and a second, reduced gain AL in a second time period TL, wherein at least one of AH, AL, TH, and TL is/are determined according to a predetermined or adaptively determined criterion including said roundtrip loop delay.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: November 21, 2017
    Assignees: OTICON A/S, BERNAFON AG
    Inventors: Bernhard Künzle, Meng Guo
  • Patent number: 9794700
    Abstract: A hearing aid having hearing loss-compensating components, active occlusion reduction components, a vent, a tuned piston, and a flexible surround. The piston and the surround combination are assembled on the faceplate and cover the outside end of the vent that is situated on the faceplate. The piston and the surround combination minimize the adverse effects of walk-induced head vibrations.
    Type: Grant
    Filed: July 5, 2011
    Date of Patent: October 17, 2017
    Assignee: Sivantos Inc.
    Inventor: Oleg Saltykov
  • Patent number: 9712915
    Abstract: A far end signal from a far end user and broadcasting the far end signal at a loudspeaker is received. A signal for use in an echo transfer function is determined, and the signal selected from between: the far end signal or an echo reference signal received from a near field microphone disposed in close proximity to the speaker. The near field microphone sensing the far end signal that is broadcast from the speaker while sensing the near-end speech and ambient noise at insignificant energy levels compared to the speaker signal. An echo transfer function is determined based at least in part upon the selected signal, and the echo transfer function represents characteristics of an acoustic path between the loudspeaker and a far field microphone that is disposed at a greater distance from the speaker than the near field microphone. An estimated echo is determined based at least in part upon the echo transfer function.
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: July 18, 2017
    Assignee: Knowles Electronics, LLC
    Inventor: Dibyendu Nandy
  • Patent number: 9706314
    Abstract: A system and method for selectively enhancing an audio signal to make sounds, particularly speech sounds, more distinguishable. The system and method are designed to divide an input auditory signal into a plurality of spectral channels having associated unenhanced signals and perform enhancement processing on a first subset of the spectral channels and not perform enhancement processing on a second subset of the spectral channels. The enhancement processing is performed by determining an output gain for at least the first subset of spectral channels based on a time-varying history of energy of the unenhanced signals associated with each channel in the first subset of the spectral channels and applying the output gain for each of the first subset of the spectral channels to the unenhanced signals to form enhanced signals associated with each of the first subset of the spectral channels.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: July 11, 2017
    Assignees: Wisconsin Alumni Research Foundation, Purdue Research Foundation
    Inventors: Rick Lynn Jenison, Keith Raymond Kluender, Joshua Michael Alexander
  • Patent number: 9654885
    Abstract: Disclosed herein, among other things, are methods and apparatus for allocating feedback cancellation resources for improved acoustic feedback cancellation for hearing assistance devices. In various embodiments, a hearing assistance device includes a microphone and a processor configured to receive signals from the microphone and process them according to a plurality of processing blocks. The processor is adapted to include an event detector that can provide detection of an event and an output to adjust one or more processing blocks of the overall process to more efficiently use resources of the processor for the event detected, in various embodiments.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: May 16, 2017
    Assignee: Starkey Laboratories, Inc.
    Inventor: Harikrishna P. Natarajan
  • Patent number: 9635479
    Abstract: The present application discloses systems and methods to analyze feedback path information during a fitting session. In accordance with one embodiment, a method is provided and includes during a fitting session, calculating a feedback gain margin of a hearing prosthesis by causing the hearing prosthesis to receive a test signal, output an output signal based on the test signal, and receive a feedback signal based on the output of the output signal, the test signal being configured to test a different parameter of the hearing prosthesis.
    Type: Grant
    Filed: April 12, 2013
    Date of Patent: April 25, 2017
    Assignee: Cochlear Limited
    Inventors: Martin E. G. Hillbratt, Björn Davidsson
  • Patent number: 9628923
    Abstract: A new method for performing adaptive feedback suppression in a hearing aid and a hearing aid utilizing the method are provided. According to the method, a slow adaptive filter and a fast adaptive filter with different error signals for filter coefficient updating are used for feedback suppression.
    Type: Grant
    Filed: December 30, 2013
    Date of Patent: April 18, 2017
    Assignee: GN Hearing A/S
    Inventor: Erik Cornelis Diederik Van Der Werf
  • Patent number: 9590581
    Abstract: A system for suppressing signal harmonic distortion caused by a main signal processing device provides processing for an electrical signal containing sine components of multiple frequencies. A post-processor reduces the amplitude of each frequency, relative to other frequencies, as the frequency increases, thus suppressing harmonics, which have higher frequencies than their respective elementary signals. To compensate for frequency distortion caused by the differential frequency suppression in the post-processing stage, a pre-processor provided upstream of the main signal processing device provides frequency-dependent signal processing having a generally opposite effect to that of the post-processor, increasing the amplitude of each frequency of the signal passing through the pre-processor, relative to other frequencies, as the frequency increases. The resulting output signal thus has substantially the same frequency spectrum as the original signal while distortion-causing harmonics are reduced or eliminated.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: March 7, 2017
    Inventor: Vladimir Benkhan
  • Patent number: 9571949
    Abstract: An apparatus for determining cochlear dead region comprising a sound generation unit, an output transducer, and a control unit. The control unit causes the sound generation unit to provide a first electrical sound signal representing a first frequency band adjacent to a frequency region of interest, with a first bandwidth, a first sound pressure level and a first subsequent electrical sound signal representing a first subsequent frequency band comprising the frequency region of interest with a first subsequent bandwidth, a first subsequent sound pressure level, and a first subsequent time delay to the first electrical sound signal. In response, the output transducer generates a first output sound and a first subsequent output sound with the first subsequent time delay. A user compares the first output and first subsequent output sounds and decides, whether he hears a difference between the two sounds and gives a positive or negative decision input.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: February 14, 2017
    Assignees: OTICON A/S, BERNAFON AG
    Inventors: Karsten Bo Rasmussen, Barbara Simon, Neil Hockley, Christophe Lesimple, Thomas Ulrich Christiansen, Monika Bertges Reber
  • Patent number: 9532138
    Abstract: A method may include forming a plurality of beams to receive and spatially filter audible sounds from a first microphone and a second microphone. The plurality of beams may include a first unidirectional beam to receive audible sounds from the first microphone and the second microphone, a second unidirectional beam to receive audible sounds from the first microphone and the second microphone, the second unidirectional beam having a spatial null in a direction different from that of the first unidirectional beam, and an omnidirectional beam to receive audible sounds from the first microphone and the second microphone. The method may also include determining a first energy of audible sounds filtered by the first unidirectional beam and a second energy of audible sounds filtered by the second unidirectional beam and, based on the first energy and the second energy, selecting one of the plurality of beams as a selected beam.
    Type: Grant
    Filed: July 16, 2014
    Date of Patent: December 27, 2016
    Assignee: Cirrus Logic, Inc.
    Inventor: Justin Lamar Allen
  • Patent number: 9473855
    Abstract: Moving armature receiver assemblies wherein a first U-shaped armature and a second U-shaped armature are configured for suppression of vibration of a housing structure along a longitudinal housing plane. The first and second U-shaped armatures may be shifted away from each other along a longitudinal housing plane to render the first and second U-shaped armatures partially overlapping in the orthogonal plane with a predetermined overlap distance.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: October 18, 2016
    Assignee: Sonion Nederland B.V.
    Inventors: Aart Zeger van Halteren, Andreas Tiefenau, Adrianus Maria Lafort
  • Patent number: 9398380
    Abstract: Feedback whistling and external tonal signals are distinguished during feedback suppression. For that purpose an adaptation increment of an adaptive filter of a hearing apparatus for feedback reduction is controlled. A sound signal is picked up by a microphone and a microphone signal is output, from which an earpiece signal for an earpiece is generated. An adaptive filter reduces a feedback signal in the microphone signal. To this end an autocorrelation value of sampled values of the microphone signal, between which a time difference exists, is obtained, and the adaptation increment of the adaptive filter is controlled based on the autocorrelation value. A frequency of an output signal obtained on the basis of the microphone signal is shifted while creating the earpiece signal and the time difference for obtaining the autocorrelation value is controlled as a function of the shifting of the frequency of the microphone signal.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: July 19, 2016
    Assignee: Sivantos Pte. Ltd.
    Inventors: Tobias Daniel Rosenkranz, Tobias Wurzbacher
  • Patent number: 9392380
    Abstract: A hearing aid according to an embodiment of the present disclosure includes: a microphone configured to convert sound into an electric signal and output a first signal; a receiver configured to convert the third signal that is generated by performing predetermined hearing aid processing on a second signal, into sound; a first feedback removal unit having an adaptive filter configured to adaptively estimate a first transfer function of a sound feedback path from the receiver to the microphone; and a second feedback removal unit having a fixed filter configured to receive the third signal and use a fixed filter coefficient based on a second transfer function of a vibration feedback path from the receiver to the microphone. The second signal is generated by removing from the first signal, output signals from the adaptive filter and the fixed filter.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: July 12, 2016
    Assignee: RION CO., LTD.
    Inventor: Masahiro Sunohara
  • Patent number: 9357301
    Abstract: Acoustic feedback in an audio device is reduced or eliminated via a feedback compensator. The feedback compensator disposes of at least one adaptive filter whose adaptation is governed by a step-size parameter ?. A step-size parameter ? of the adaptive filter is set at a high level to eliminate acoustic feedback and the parameter ? is decreased when a critical excitation signal is detected. This way to proceed allows for efficient elimination of feedback whistling while required environment signals are retained.
    Type: Grant
    Filed: October 17, 2012
    Date of Patent: May 31, 2016
    Assignee: Sivantos Pte. Ltd.
    Inventors: Sebastian Pape, Tobias Wurzbacher
  • Patent number: 9357319
    Abstract: An elastic body of an audio accessory is provided. The elastic body includes a cylindrical inner cover, at least one outer cover which is elongated from a top end edge of the cylindrical inner cover to enclose the cylindrical inner cover, the at least one outer cover having at least one inlet which partially exposes at least a part of the cylindrical inner cover, and at least one sensor module disposed on at least one of the cylindrical inner cover and the at least one outer cover and configured to generate a sensor signal related to deformation of the at least one outer cover.
    Type: Grant
    Filed: August 18, 2014
    Date of Patent: May 31, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Byounguk Yoon, Changryong Heo, Yongsang Yun
  • Patent number: 9349363
    Abstract: An audio signal processing system and an echo signal removing method thereof are provided. The audio signal processing system includes a speaker that is configured to output an audio signal; a microphone that is configured to receive the audio signal output by the speaker including an echo signal generated by the audio signal; an echo signal delay unit that is configured to delay the echo signal for a bulk delay time, and output the echo signal that is delayed; and an echo signal removing unit that is configured to remove the echo signal that is delayed and output by the echo signal delay unit from the audio signal received by the microphone, wherein the echo signal delay unit includes a bulk delay measuring unit that is configured to measure a bulk delay by analyzing impulse response characteristics of an echo path.
    Type: Grant
    Filed: July 9, 2013
    Date of Patent: May 24, 2016
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jae-hoon Jeong, Andreas Schwarz, Walter Kellermann
  • Patent number: 9351086
    Abstract: A hearing aid device is disclosed. The hearing aid device comprises a receiver configured to be arranged in the ear canal. The hearing aid device comprises a directional microphone system comprising two microphones or one microphone having two sound inlets. The hearing aid device comprises means for counteracting acoustic feedback on the basis of sound signals detected by the two microphones or the two sound inlets. The hearing aid device comprises an “open fitting” providing ventilation. The two microphones or the two sound inlets of the directional microphone (forming part of a directional system) are arranged in the ear canal at the same side of the receiver and sound is allowed to propagate freely between the microphones or between the inlets of the directional microphone and the receiver. Preferably, the hearing aid device comprises a procedure (such as an adaptive procedure) for optimizing the directional system of the hearing aid device.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: May 24, 2016
    Assignee: OTICON A/S
    Inventors: Svend Oscar Petersen, Pauli Minnaar
  • Patent number: 9332358
    Abstract: Monitoring usage of a hearing device includes: c) checking whether a message has been received within a time period (dt) shorter than a pre-defined time period (Dt) via a long-distance communication network in a remote device; and d) generating usage status data dependent on the result of the checking addressed in step c). The usage status data are indicative of the usage of the hearing device, indicating “use” if the time period (dt) is smaller than or equal to the pre-defined time period (Dt) and indicating “non-use” if the time period (dt) is larger than the pre-defined time period (Dt). The message includes identification data for identifying the hearing device or a user of said hearing device. The remote device is located remote from the hearing device and connected to the long-distance communication network. The time period (dt) starts from a start event.
    Type: Grant
    Filed: January 16, 2012
    Date of Patent: May 3, 2016
    Assignee: SONOVA AG
    Inventors: Bernd Waldmann, Hans-Ueli Roeck, Michael Boretzki, Stefan Launer, Rainer Platz
  • Patent number: 9319814
    Abstract: Methods and apparatus for fitting a hearing aid device (3) that includes a part which is arranged in the ear canal (2) of a user (31).
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: April 19, 2016
    Assignee: Sonova AG
    Inventors: Thomas Zurbruegg, Alfred Stirnemann, Stefan Launer
  • Patent number: 9318123
    Abstract: Provided are a method and apparatus for reproducing sound. A sound signal may be generated by receiving sound around the apparatus. An output signal may be generated by performing a process according to functions of the apparatus on a residual signal obtained by canceling a feedback signal from the sound signal.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: April 19, 2016
    Assignees: Samsung Electronics Co., Ltd., Industry-Academic Cooperation Foundation, Yonsei University
    Inventors: Jun-il Sohn, Yoon-seo Koo, Young-cheol Park, Dong-wook Kim
  • Patent number: 9319803
    Abstract: When hearing-aid processing and predetermined-sound suppression processing are performed, in order to reduce an increase in delay of an output sound in response to an input sound greater than a case where only the hearing-aid processing is performed, a hearing aid includes: a hearing-aid processing unit configured to amplify a first acoustic signal received by a microphone, according to an ability of a user to hear sound in each of frequencies, to produce a second acoustic signal; a predetermined-sound detection unit configured to detect a predetermined sound included in the first acoustic signal, and to produce a control signal indicating generation timing of the predetermined sound; and a predetermined-sound suppression unit configured to suppress the second acoustic signal produced in the hearing-aid processing unit at the generation timing of the predetermined-sound indicated by the control signal produced in the predetermined-sound detection unit.
    Type: Grant
    Filed: January 16, 2012
    Date of Patent: April 19, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Shinya Gozen