公开(公告)号：US11849284B2

公开(公告)日：2023-12-19

申请号：US17976154

申请日：2022-10-28

Applicant: Oticon A/S

Inventor： Meng Guo ,  Bernhard Kuenzle

IPC: H04R25/00

CPC classification number: H04R25/453 ,  H04R25/353 ,  H04R25/505 ,  H04R2225/43

Abstract: A hearing aid is configured to be worn in and/or at an ear of a user, and comprises a) an input transducer for converting an input sound to an electric input signal representing sound, h) an output transducer for converting a processed electric output signal to an output sound, c) a signal processor operationally coupled to the input and output transducers and configured to apply a forward gain to the electric input signal or a signal originating therefrom, wherein the input transducer, the signal processor and the output transducer forming part of a forward path of the hearing aid. The hearing aid further comprises d) a feedback control system for compensating for acoustic or mechanical feedback of an external feedback path from the output transducer to the input transducer, wherein the feedback control system comprises i) a feedback estimation unit for providing a feedback estimate signal of said external feedback path, ii) a combination unit located in the forward path for combining the electric input signal or a signal derived therefrom and the feedback signal detected by said estimation unit, to provide a resulting feedback corrected signal, iii) a correlation detection unit configured to determine a correlation measure between said feedback corrected signal and said output signal, said correlation detection unit further configured to provide a processed version of said correlation measure.

公开(公告)号：US11363389B2

公开(公告)日：2022-06-14

申请号：US16950532

申请日：2020-11-17

Applicant: Oticon A/S

Inventor： Michael Syskind Pedersen ,  Svend Oscar Petersen ,  Meng Guo ,  Karsten Bo Rasmussen ,  Troels Holm Pedersen ,  Kenneth Rueskov Møller

IPC: H04R25/00

Abstract: A hearing device comprises an ITE-part adapted for being located at or in an ear canal of the user comprising a housing comprising a seal towards walls or the ear canal, the ITE part comprising at least two microphones located outside the seal and facing the environment, and at least one microphone located inside the seal and facing the ear drum. The hearing device may comprise a beamformer filter connected to said at least three microphones comprising a first beamformer for spatial filtering said sound in the environment based on input signals from said at least two microphones facing the environment, and a second beamformer for spatial filtering sound reflected from the ear drum based on said at least one electric input signal from said at least one microphone facing the ear drum and at least one of said input signals from said at least two microphones facing the environment.

公开(公告)号：US11184714B2

公开(公告)日：2021-11-23

申请号：US16801832

申请日：2020-02-26

Applicant: Oticon A/S

Inventor： Meng Guo ,  Bernhard Kuenzle ,  Martin Kuriger

IPC: H04R25/00 ,  H03G3/30

Abstract: A hearing device comprises an input transducer providing an input gain GI, a signal processor comprising a compressor for determining a frequency and level dependent desired compressor gain GP to compensate for a hearing impairment of the user, and to provide a resulting compressor gain G′P, and an output transducer for providing output stimuli perceivable as sound for the user based on a processed signal, the output transducer providing an output gain, GO. A resulting forward path gain G′ is defined in a logarithmic representation as GI+G′P+GO. The hearing device further comprises a loop gain estimator for continuously estimating a current loop gain ΔL(n), configured to provide a loop gain estimate within a predefined number of feedback loop delays after a feedback buildup has started, and a loop gain controller for dynamically controlling said resulting forward path gain G′ in dependence of said estimate of said current loop gain ΔL(n). A resulting loop gain, LG′, is determined as a sum of the resulting forward path gain G′ and a feedback gain H when given in a logarithmic representation. The loop gain controller is configured to provide that the resulting loop gain is limited to stay below a predefined value.

公开(公告)号：US10966038B2

公开(公告)日：2021-03-30

申请号：US16270784

申请日：2019-02-08

Applicant: Oticon A/S

Inventor： Susanna Løve Callaway ,  Nicolas Le Goff ,  Terri Ives ,  Nimrod Bogdanovski ,  Mikkel Bo Rasmussen ,  Anders Meng ,  Martin Kuriger ,  Meng Guo ,  Mikkel Grønbech ,  Mojtaba Farmani ,  Nels Hede Rohde ,  Stefan Gram ,  Sudershan Yalgalwadi Sreepadarao ,  Bernhard Kuenzle

IPC: H04R25/00

Abstract: A method of conducting a fitting session for fitting a hearing device to a hearing device user's needs is provided. The method comprises S1. providing an estimate of, a current feedback from said output transducer to said input transducer, while the hearing device is in an operational state; S2. evaluating said estimate of a current feedback and providing a value of a feedback risk indicator in dependence of said estimate of a current feedback; S3. determining whether said value of the feedback risk indicator fulfils a high-risk criterion; and S4. if said high-risk criterion is fulfilled providing at least one of a warning, a recommendation, and an action in relation to said feedback risk. Steps S1 to S4 are configured to be automatically performed as background processes.
Thereby a simplified scheme for fitting a hearing device to a user's needs may be provided.

公开(公告)号：US10659891B2

公开(公告)日：2020-05-19

申请号：US16440140

申请日：2019-06-13

Applicant: Oticon A/S

Inventor： Martin Kuriger ,  Bernhard Kuenzle ,  Meng Guo

IPC: H04R25/00 ,  H04M9/08 ,  H04R3/02

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.

公开(公告)号：US10200796B2

公开(公告)日：2019-02-05

申请号：US15785927

申请日：2017-10-17

Applicant: Oticon A/S ,  Bernafon AG

Inventor： Bernhard Künzle ,  Meng Guo

IPC: H04R25/00 ,  H04R1/10

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.

公开(公告)号：US09826319B2

公开(公告)日：2017-11-21

申请号：US15257295

申请日：2016-09-06

Applicant: Oticon A/S ,  Bernafon AG

Inventor： Bernhard Künzle ,  Meng Guo

IPC: H04R25/00 ,  H04R1/10

CPC classification number: H04R25/453 ,  H04R1/1041 ,  H04R25/356 ,  H04R2225/43

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.

公开(公告)号：US09100736B2

公开(公告)日：2015-08-04

申请号：US13622880

申请日：2012-09-19

Applicant: OTICON A/S

Inventor： Jesper Jensen ,  Meng Guo

IPC: H04B15/00 ,  H04M9/08 ,  H04R3/02 ,  H04R3/00 ,  H04R25/00 ,  H04R27/00

CPC classification number: H04R3/02 ,  H04R3/005 ,  H04R25/407 ,  H04R25/453 ,  H04R27/00

Abstract: Method and audio processing system determine a system parameter sp in a gain loop of an audio processing system. An alternative scheme is provided for feedback estimation in a multi-microphone audio processing system comprising an injected probe signal. The problem is solved in that a) an expression of an approximation of the expected square of the stationary loop gain, LGstat(ω,n), and b) an expression of the convergence or decay rate of the expected square of the stationary loop gain, LGstat(ω,n), after an abrupt change in one or more system parameters are determined, and in that c) a system parameter sp is determined from one of said expressions under the assumption that other system parameters are fixed. The method has the advantage of providing a relatively simple way of identifying and controlling dynamic changes in the acoustic feedback path(s).

Abstract translation: 方法和音频处理系统确定音频处理系统的增益循环中的系统参数sp。 提供了一种替代方案，用于包括注入的探针信号的多麦克风音频处理系统中的反馈估计。 解决的问题是a）静态环路增益的预期平方的近似表达式，LGstat（ω，n），以及b）平稳环路增益的预期平方的收敛或衰减速率的表达式 在确定一个或多个系统参数的突然变化之后，确定LGstat（ω，n），并且其中c）在假设其他系统参数是固定的情况下，从所述表达式之一确定系统参数sp。 该方法具有提供识别和控制声反馈路径中的动态变化的相对简单的方法的优点。

公开(公告)号：US12096184B2

公开(公告)日：2024-09-17

申请号：US17673089

申请日：2022-02-16

Applicant: Oticon A/S

Inventor： Meng Guo ,  Anders Meng ,  Bernhard Kuenzle

IPC: H04R25/00

CPC classification number: H04R25/453 ,  H04R25/606

Abstract: A hearing aid includes a forward path including a) an input transducer proving an electric input signal, b) a hearing aid processor, and c) an output transducer. The hearing aid further includes d) a feedback control system having d1) a feedback path estimator including an adaptive filter configured to provide an estimate of a current feedback path from the output transducer to at least one input transducer, the feedback path estimator being controllable via a feedback estimation control input, and d2) a combination unit in the forward path configured to subtract the estimate (v′) of the current feedback path signal (v) from a signal of the forward path (y) to provide a feedback corrected signal (e), and e) a detector for providing the feedback estimation control input in dependence of an offset control signal indicative of an offset in the electric input signal or a signal originating therefrom.

公开(公告)号：US12052546B2

公开(公告)日：2024-07-30

申请号：US17704355

申请日：2022-03-25

Applicant: Oticon A/S

Inventor： Sudershan Yalgalwadi Sreepadarao ,  Anders Meng ,  Mojtaba Farmani ,  Martin Kuriger ,  Mikkel Grønbech ,  Meng Guo

IPC: H04R25/00

CPC classification number: H04R25/43 ,  H04R25/507 ,  H04R25/554

Abstract: A hearing aid includes an input unit, an output unit, a signal processing unit connected to said input unit and output unit, where the input unit, the signal processing unit and the output unit are forming part of a forward path of the hearing aid, where the signal processing unit is configured to apply a forward gain to the at least one electric input signal or a signal originating therefrom. The hearing aid further includes a feedback control unit configured to reduce a risk of howl due to acoustic, electrical, and/or mechanical feedback of an external feedback path from the output unit to the input unit of said hearing aid, where the hearing aid is configured to receive motion data characterising movement and/or acceleration and/or orientation and/or position of the hearing aid to control processing.