Browse > Article

A feedback cancellation algorithm with time delay and time-varying decorrelation filter for digital hearing aid  

Lee, Sang-Min (Division of Bionics and Bioinformatics, Chonbuk National University)
Park, Young (Computer. Telecommunicatin Engineering Division)
Jung, Se-Young (Dept. of Biomedical Engineering, Hanyang University)
Kim, In-Young (Dept. of Biomedical Engineering, Hanyang University)
Kim, Sun-I (Dept. of Biomedical Engineering, Hanyang University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SC / v.42, no.4, 2005 , pp. 45-50 More about this Journal
Abstract
In digital hearing aid system, one of the main problems is acoustic feedback which is known as howling because of miniaturization md high-gain amplification. In this paper, we proposed a feedback cancellation algorithm for hearing aid using time delay and time-varying decorrelation filter. The proposed algorithm has a kind of adaptive filter structure, which is combined with time delay and time-varying decorrelation filter to improve feedback cancellation. An all pass filter was implemented as the time-varying decorrelation filter using low frequency modulator. From the result of computer simulation, it is verified that the proposed algorithm has good ability to cancel feedback.
Keywords
feedback cancellation; time-varying decorrelation filter; digital hearing aid;
Citations & Related Records
연도 인용수 순위
  • Reference
1 M. G. Siqueira, and A. Alwan, 'Steady-state analysis of continuous adaptation in acoustic feedback reduction system for hearing-aids,' IEEE Trans. Speech Audio Processing, vol. 8 no. 4, pp. 443-453, July 2000   DOI   ScienceOn
2 G. Long, F. Ling, and J. G. Proakis, 'The LMS algorithm with delayed coefficient adaptation,' IEEE Trans. Acoust., Speech Signal Processing , vol. 37, pp. 1397-1405, Sept. 1985   DOI   ScienceOn
3 G. S. Kendall, 'The decorrelation of audio signals and its impact on spatial imagery,' Computer Music Journal, vol. 19, no. 4, pp. 72-87, Winter 1995   DOI
4 M. Ali, 'Stereophonic acoustic echo cancellation system using time-varying allpassfiltering for signal decorrelation,' in proc. ICASSP-98, pp. 3689-3692, April 1998
5 U. Zolzer, DAFX: Digital Audio Effects, John Wiley & Sons, Ltd., New York, 2002
6 J. M. Kates, 'Feedback cancellation in hearing aids: Results from a computer simulation,' IEEE Trans. Signal Process, vol.39, no. 9, pp. 553-562, March 1991   DOI
7 J. A. Maxwell and P. M. Zurek, 'Reducing acoustic feedback in hearing aids,' IEEE Trans. Speech Audio Processing, vol. 3, no. 4, pp. 304-313, July 1995   DOI   ScienceOn
8 D. K. Bustamante, T. L. Worrall, and M. J. Williamson, 'Measurement and adaptive suppression of acoustic feedback in hearing aids,' pros. ICASSP-89, pp. 2017-2020, April 1989   DOI