Method of managing adaptive feedback cancellation in hearing devices and hearing devices configured to carry out such method
US10811028B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2016 |
| Grant date | Oct 20, 2020 |
| Priority date | — |
| Expiry date | Aug 22, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2430/03
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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). The method according to the present invention comprises the steps of: estimating the external acoustic feedback path transfer function (3) by modeling/deriving a first estimated feedback path transfer function (8) to reflect the external acoustic feedback path transfer function (3), by said feedback canceler unit (5); com…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.