Patents by Inventor Hannes Wuethrich

Hannes Wuethrich has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of managing adaptive feedback cancellation in hearing devices and hearing devices configured to carry out such method
    Patent number: 10811028
    Abstract: This invention relates to a method of managing adaptive feedback cancellation in a hearing device comprising at least a microphone (1); a receiver (2); and a signal processing circuitry, configured to receive from said microphone (1) an input signal (Xtd, Xfd, Xc) and to provide said receiver (2) with an output signal (Yfd, Ufd, Utd). An external acoustic feedback path (300) defined by feedback sound (fb) traveling from the receiver (2) to the microphone (1) is represented by an external feedback path transfer function (3). The signal processing unit comprises at least a gain unit (4); a feedback canceller unit (5) comprising an adaptive filter element (6) configured to adaptively accommodate changes in said external acoustic feedback path transfer function (3); and a frequency shift unit (7) configured to stabilize an adaptation of the feedback canceler unit (5).
    Type: Grant
    Filed: August 22, 2016
    Date of Patent: October 20, 2020
    Assignee: Sonova
    Inventors: Samuel Bucher, Xavier Gigandet, Jean-Louis Durrieu, Hannes Wuethrich, Markus Hofbauer
  • A Method of Managing Adaptive Feedback Cancellation in Hearing Devices and Hearing Devices Configured to Carry out Such Method
    Publication number: 20190198037
    Abstract: This invention relates to a method of managing adaptive feedback cancellation in a hearing device comprising at least a microphone (1); a receiver (2); and a signal processing circuitry, configured to receive from said microphone (1) an input signal (Xtd, Xfd, Xc) and to provide said receiver (2) with an output signal (Yfd, Ufd, Utd). An external acoustic feedback path (300) defined by feedback sound (fb) traveling from the receiver (2) to the microphone (1) is represented by an external feedback path transfer function (3). The signal processing unit comprises at least a gain unit (4); a feedback canceller unit (5) comprising an adaptive filter element (6) configured to adaptively accommodate changes in said external acoustic feedback path transfer function (3); and a frequency shift unit (7) configured to stabilize an adaptation of the feedback canceler unit (5).
    Type: Application
    Filed: August 22, 2016
    Publication date: June 27, 2019
    Inventors: Samuel Bucher, Xavier Gigandet, Jean-Louis Durrieu, Hannes Wuethrich, Markus Hofbauer