公开(公告)号：US20220264231A1

公开(公告)日：2022-08-18

申请号：US17673089

申请日：2022-02-16

Applicant: Oticon A/S

Inventor： Meng GUO ,  Anders MENG ,  Bernhard KUENZLE

IPC: H04R25/00

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：US20190297433A1

公开(公告)日：2019-09-26

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

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：US20170070827A1

公开(公告)日：2017-03-09

申请号：US15257295

申请日：2016-09-06

Applicant: Oticon A/S ,  Bernafon AG

Inventor： Meng GUO ,  Bernhard KÜNZLE

IPC: H04R25/00

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.

Abstract translation: 听力装置，例如 提供了一种助听器，包括前进路径，其包括用于提供电输入信号的输入换能器，被配置为向所述电输入信号施加所请求的正向增益的信号处理单元和输出换能器。 听力装置还包括反馈减少单元，用于降低由于从输出换能器到输入换能器的反馈而引起的嚎叫风险。 前向路径和外部反馈路径定义了往返循环延迟。 反馈减少单元被配置为在时间上调制所请求的正向增益，以便提供所得到的正向增益在第一时间段TH中呈现第一增益增益AH，在第二时间段TL中呈现第二减小的增益AL，其中 根据包括所述往返循环延迟的预定或自适应确定的标准来确定AH，AL，TH和TL中的至少一个。

公开(公告)号：US20150139460A1

公开(公告)日：2015-05-21

申请号：US14542067

申请日：2014-11-14

Applicant: OTICON A/S

Inventor： Michael Syskind PEDERSEN ,  Jesper JENSEN ,  Meng GUO

IPC: H04R25/00

CPC classification number: H04R25/453 ,  H04M1/20 ,  H04M9/082 ,  H04R3/002 ,  H04R25/552 ,  H04R25/554 ,  H04R25/558 ,  H04R25/70 ,  H04R2225/55 ,  H04R2430/03

Abstract: A hearing device comprises a feedback-path estimation unit, which adaptively estimates a feedback path from an output transducer to an input transducer, and sets an adaptation-step size of an adaptive feedback-path estimation algorithm in dependence on an estimate of a background-noise spectrum. The feedback-path estimation unit provides an estimation-control signal for generating an acoustic feedback-path estimation signal having an level spectrum, which has at least one first frequency band with non-zero level and at least one second frequency band with zero level or with a non-zero level smaller than the level in the first frequency band and smaller than a background-noise level in the respective second frequency band. Background noise is detected in the second frequency band while the feedback-path estimation signal is provided. The background-noise level in the at least one first frequency band is estimated for obtaining the estimate of the background-noise spectrum. A corresponding method is described. The method is e.g. useful for estimating a feedback path during fitting of a hearing device, e.g. a hearing aid, to a particular user's needs.

Abstract translation: 听力装置包括反馈路径估计单元，其自适应地估计从输出换能器到输入换能器的反馈路径，并且根据背景音调估计的估计设置自适应反馈路径估计算法的自适应步长， 噪声谱。 反馈路径估计单元提供用于生成具有电平频谱的声反馈路径估计信号的估计控制信号，该电平频谱具有至少一个具有零电平的第一频带和至少一个具有零电平的第二频带， 具有小于第一频带中的电平的非零电平并且小于相应的第二频带中的背景噪声电平。 在提供反馈路径估计信号的同时，在第二频带中检测到背景噪声。 估计至少一个第一频带中的背景噪声电平以获得背景噪声谱的估计。 描述相应的方法。 该方法是例如 用于在安装听觉装置期间估计反馈路径，例如， 助听器，用于特定用户的需要。

公开(公告)号：US20130070936A1

公开(公告)日：2013-03-21

申请号：US13622880

申请日：2012-09-19

Applicant: OTICON A/S

Inventor： Jesper JENSEN ,  Meng GUO

IPC: G10K11/16

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。