Title:
BAND-LIMITED ADAPTIVE FEEDBACK CANCELLER FOR HEARING AIDS
Document Type and Number:
WIPO Patent Application WO2000019605
Kind Code:
A3
Abstract:
An improved method for adaptively cancelling acoustic feedback in hearing aids and other audio amplification devices. Feedback cancellation is limited to a frequency band that encompasses all unstable frequencies. By limiting the bandwidth of the feedback cancellation signal, the distortion due to the adaptive filter is minimized and limited only to the unstable feedback regions. A relatively simple signal processing algorithm is used to produce highly effective results with minimal signal distortion.
Inventors:
GAO SHAWN
SOLI SIGFRID
CHI HSIANG-FENG
SOLI SIGFRID
CHI HSIANG-FENG
Application Number:
PCT/US1999/022757
Publication Date:
July 06, 2000
Filing Date:
September 30, 1999
Export Citation:
Assignee:
HOUSE EAR INST (US)
International Classes:
H04R3/02; H03H21/00; H04B3/23; H04R25/00; (IPC1-7): H04R25/00; H04R3/02
Domestic Patent References:
| WO1996035314A1 | 1996-11-07 |
Foreign References:
| EP0579152A1 | 1994-01-19 | |||
| US5259033A | 1993-11-02 | |||
| GB2274372A | 1994-07-20 | |||
| US5142552A | 1992-08-25 |
Download PDF:
Previous Patent: APPARATUS AND METHOD FOR IMPROVING POWER CONTROL LOOP LINEARITY
Next Patent: CHANNEL SELECTION IN DIGITAL TELEVISION BACKGROUND
Next Patent: CHANNEL SELECTION IN DIGITAL TELEVISION BACKGROUND