Method for feedback cancelling in a hearing device and a hearing device
US8265313B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 22, 2007 |
| Grant date | Sep 11, 2012 |
| Priority date | — |
| Expiry date | Sep 28, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and a hearing device for cancelling or preventing feedback are disclosed. The hearing device comprises a microphone (1), a transfer function (2) and a receiver (3), wherein the transfer function (2) defines relation between an input signal (12) of the hearing device and an output signal (13, 13′) of the hearing device. The method according to the present invention comprises the steps of estimating an external transfer function (21) of an external feedback path (11) defined by sound traveling from the receiver (3) to the microphone (1), estimating the input signal (12′) having no feedback components of the external feedback path (11) using an auxiliary signal (15), which does not comprise feedback components of the external feedback path (11), and using the estimated input signal (14) for estimating the external transfer function (21) of the external feedback path (11).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.