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：US11825269B2

公开(公告)日：2023-11-21

申请号：US17704828

申请日：2022-03-25

Applicant: Oticon A/S

Inventor： Meng Guo ,  Bernhard Kuenzle ,  Anders Meng ,  Martin Kuriger ,  Mojtaba Farmani ,  Mikkel Grønbech ,  Sudershan Yalgalwadi Sreepadarao ,  Kim Tilgaard Petersen

IPC: H04R25/00

CPC classification number: H04R25/453 ,  H04R25/505

Abstract: A hearing aid includes an input unit, an output unit, a signal processing unit connected to the input unit and output unit, where the input unit, the signal processing unit and the output unit form 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 reduction unit configured to reduce risk of howl due to acoustic, electrical, and/or mechanical feedback of an external feedback path from the output unit to the input unit. The feedback reduction unit is configured to modulate the forward gain in time to provide that the forward gain exhibits an increased or unchanged forward gain in one or more first time periods and a reduced forward gain in one or more second time periods.

公开(公告)号：US11812224B2

公开(公告)日：2023-11-07

申请号：US17687191

申请日：2022-03-04

Applicant: Oticon A/S

Inventor： Bernhard Kuenzle ,  Meng Guo

IPC: H04R25/00

CPC classification number: H04R25/505 ,  H04R25/407 ,  H04R25/453

Abstract: A hearing device includes a feedback control system that applies an adaptive filtering algorithm. The adaptive algorithm provides a filter control signal to adaptively control filter coefficients based on first and second algorithm input signals of a forward path. The feedback control system further includes first and second transform units for transforming the first and second algorithm input signals to the transform domain, and an inverse transform unit to convert an estimate of the current feedback path in the transformed domain to a time domain estimate, and a combination unit in the forward path to subtract the estimate of the current feedback signal from a signal of the forward path to provide a feedback corrected signal.

公开(公告)号：US11785404B2

公开(公告)日：2023-10-10

申请号：US17708467

申请日：2022-03-30

Applicant: Oticon A/S

Inventor： Meng Guo ,  Bernhard Kuenzle

IPC: H04R25/00

CPC classification number: H04R25/70 ,  H04R25/453 ,  H04R25/505 ,  H04R2225/55

Abstract: In a method of fitting of a hearing device having an input transducer and an output transducer, the method includes executing a fitting application on a graphical user interface of an external device in communication with the hearing device, detecting by measuring reactions of the user to picked-up sound, performing acoustic feedback measurements as a background process without a user's involvement, assessing the probability of a correct physical fit based on the position of the inserted hearing device, assessing feedback risk based on the correct physical fit assessment and the acoustic feedback measurements, and fine tuning fitting parameter of the hearing device based on the result of at least one of the detected reactions of the user, acoustic feedback measurements and saved, within the fitting application, personal information of the user.

公开(公告)号：US20220210581A1

公开(公告)日：2022-06-30

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

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.