Oscillation detection

Details Oscillation detection Oscillation detection

2007-11-27

2007-11-27

Tran, Sinh (Department: 2615)

Electrical audio signal processing systems and devices

Hearing aids, electrical

Noise compensation circuit

C381S093000

Reexamination Certificate

active

10557533

ABSTRACT:
The invention relates to oscillation detection and, more particularly, concerns a method and apparatus for identifying oscillation in a signal due to feedback, permitting appropriate action to be taken to suppress the oscillation. The method involves using an FFT device or similar to convert a signal at each of a series of successive time windows into the frequency domain, calculating, for each of a plurality of frequency bands, the change in signal phase from a time window to a subsequent time window, and comparing, for some or all of said frequency bands, the results of the calculation step to one or more defined criteria to provide a measure of whether oscillation due to feedback is present in the signal. For additional discrimination, the change in signal amplitude from a time window to a subsequent time window may also be calculated for each of the frequency bands, and the result compared with one or more further defined criteria. The invention has particular application in hearing aid devices.

REFERENCES:
patent: 4449237 (1984-05-01), Stepp et al.
patent: 6404895 (2002-06-01), Weidner
patent: 6434246 (2002-08-01), Kates et al.
patent: 6498858 (2002-12-01), Kates
patent: 6587559 (2003-07-01), Bartkowiak
patent: 6914979 (2005-07-01), Kurtz et al.
patent: 2004/0190731 (2004-09-01), Luo et al.

Affiliated with

Also associated with

Rating

Oscillation detection does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Oscillation detection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oscillation detection will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3832682