DocumentCode
2953806
Title
Feedback cancellation in hearing aids
Author
Kates, James
Author_Institution
City Univ. of New York, NY, USA
fYear
1990
fDate
3-6 Apr 1990
Firstpage
1125
Abstract
Feedback cancellation in hearing aids is discussed. It involves estimating the feedback signal and subtracting it from the microphone input signal. The system described updates the estimated feedback path whenever changes are detected in the feedback behavior. The normal hearing-aid processing is then interrupted, a probe signal is injected into the system, and a set of filter coefficients is adjusted to give an estimate and the feedback path. Both LMS adaptive filter and Wiener filter approaches were simulated, with the Wiener filter giving better performance at poor signal-to-noise ratios. The simulation results indicate that feedback suppression in excess of 10 dB is possible
Keywords
adaptive filters; digital simulation; feedback; hearing aids; signal detection; signal processing; LMS adaptive filter; Wiener filter; feedback signal; feedback suppression; hearing aids; simulation; Adaptive filters; Auditory system; Feedback; Hearing aids; Least squares approximation; Microphones; Noise cancellation; Probes; Signal processing; Signal to noise ratio; Vents; Wiener filter;
fLanguage
English
Publisher
ieee
Conference_Titel
Acoustics, Speech, and Signal Processing, 1990. ICASSP-90., 1990 International Conference on
Conference_Location
Albuquerque, NM
ISSN
1520-6149
Type
conf
DOI
10.1109/ICASSP.1990.116141
Filename
116141
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