Title :
On the improvement of acoustic feedback cancellation in hearing-aid
Author :
Chankawee, A. ; Tangsangiumvisai, N.
Author_Institution :
Dept. of Electr. Eng., Chulalongkorn Univ., Bangkok, Thailand
Abstract :
This paper presents a decorrelation technique to improve the performance of acoustic feedback cancellation in hearing aids, particularly for the continuous adaptation approach. It is proposed that the input and the output signals of the hearing aids are decorrelated via the use of higher-order time-varying allpass filters in order to adequately decorrelate the signals with as little degradation of the quality of the output signal of the hearing aids as possible. Simulation results are presented based on real speech signals and supported by subjective listening tests.
Keywords :
acoustic signal processing; all-pass filters; decorrelation; feedback; hearing aids; noise abatement; acoustic feedback cancellation; continuous adaptation; hearing-aid; listening tests; signal decorrelation; speech signals; time-varying allpass filters; Acoustic devices; Acoustic signal detection; Adaptive filters; Auditory system; Decorrelation; Degradation; Delay; Detectors; Feedback; Hearing aids;
Conference_Titel :
Circuits and Systems, 2004. MWSCAS '04. The 2004 47th Midwest Symposium on
Print_ISBN :
0-7803-8346-X
DOI :
10.1109/MWSCAS.2004.1354080
