公开(公告)号：US10368175B2

公开(公告)日：2019-07-30

申请号：US15690688

申请日：2017-08-30

Applicant: Oticon A/S

Inventor： Martin Kuriger ,  Bernhard Kuenzle ,  Meng Guo

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

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：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：US11862138B2

公开(公告)日：2024-01-02

申请号：US17684723

申请日：2022-03-02

Applicant: Oticon A/S

Inventor： Bernhard Kuenzle ,  Meng Guo

IPC: G10K11/178 ,  G10L21/0232 ,  H04R1/10

CPC classification number: G10K11/17813 ,  G10L21/0232 ,  H04R1/1016 ,  H04R1/1041 ,  H04R1/1091

Abstract: A hearing device comprises a forward path comprising an input transducer providing at an electric input signal representative of environment sound, a signal processor for processing said at least one electric input signal and providing a processed signal, and a loudspeaker connected to a speaker sound outlet providing an output sound to an eardrum of the user in dependence of said processed signal. The hearing device comprises an ITE-part adapted for being located in an ear canal of the user, an active emission canceller providing an electric sound cancelling signal, and an environment facing loudspeaker providing an output sound to the environment. The electric sound cancelling signal is determined in dependence of said processed signal to attenuate sound leaked from the speaker sound outlet to the environment when played by the environment facing loudspeaker. The environment facing loudspeaker has a sound outlet on an environment facing surface of the ITE-part.

公开(公告)号：US20230254649A1

公开(公告)日：2023-08-10

申请号：US18303052

申请日：2023-04-19

Applicant: Oticon A/S

Inventor： Bernhard Kuenzle ,  Martin Kuriger ,  Meng Guo

IPC: H04R25/00 ,  H04R3/02

CPC classification number: H04R25/453 ,  H04R3/02 ,  H04R25/505 ,  H04R2225/43 ,  H04R2430/03

Abstract: A method of detecting a sudden change in a feedback/echo path of a hearing aid is based on a gradient of an adaptive filter comprising an adaptive algorithm configured to estimate the feedback/echo path. The method may comprise comparing a smoothed and processed version of the gradient values over time to a threshold value. A hearing aid configured to detect a sudden change in a feedback/echo path is furthermore provided.

公开(公告)号：US11671767B2

公开(公告)日：2023-06-06

申请号：US17560611

申请日：2021-12-23

Applicant: Oticon A/S

Inventor： Bernhard Kuenzle ,  Martin Kuriger ,  Meng Guo

IPC: H04R25/00 ,  H04R3/02

CPC classification number: H04R25/453 ,  H04R3/02 ,  H04R25/505 ,  H04R2225/43 ,  H04R2430/03

Abstract: A hearing aid includes a feedback control system for handling external feedback from an output transducer to an input transducer. The feedback control system includes an open loop gain estimator for providing an instant open loop gain estimate; an adaptive filter configured to provide a current estimate of the feedback path transfer function; a feedback change estimator configured to provide an instant estimate of the feedback path transfer function in dependence of the forward path transfer function, the instant open loop gain estimate; and an adaptive filter controller for providing an update transfer function estimate for the adaptive filter in dependence of the instant estimate of the feedback path transfer function. The hearing aid is configured to use the update transfer function estimate in the adaptive filter to update the current estimate of the feedback path transfer function. A method of detecting a sudden change in a feedback/echo path is further disclosed.

公开(公告)号：US11516600B2

公开(公告)日：2022-11-29

申请号：US17397439

申请日：2021-08-09

Applicant: Oticon A/S

Inventor： Meng Guo ,  Bernhard Kuenzle

IPC: H04R25/00

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, b) 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：US10687152B2

公开(公告)日：2020-06-16

申请号：US16176862

申请日：2018-10-31

Applicant: Oticon A/S

Inventor： Martin Kuriger ,  Bernhard Kuenzle ,  Meng Guo

IPC: H04R25/00 ,  H04R3/02

Abstract: A hearing device, e.g. a hearing aid, comprises an input transducer for providing an electric input signal representative of a sound in the environment of the hearing device, an output transducer for providing an output sound representative of said electric input signal, a signal processor operationally connected to the input and output transducers, and forming part of an electric forward path for processing said electric input signal and providing a processed electric output signal, and a feedback detector for providing first and second indications of current feedback in an external—acoustic and/or mechanical—feedback path from said output transducer to said input transducer. The feedback detector is configured to determine the first and second indications of current feedback, respectively, based on said electric input signal or a processed version thereof and—optionally—on a current open loop magnitude of a feedback loop defined by said forward path and said external feedback path. The first and second indications of current feedback are generated with first and second time constants, respectively, where the first time constant is larger than the second time constant. The application further relates to a method of estimating feedback in a hearing device.

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：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.