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A Subband Structured Digital Hearing Aid Design for Compensating Sensorineural Hearing Loss  

Park Jo-Dong (충북대학교 전자공학과)
Choi Hun (충북대학교 전자공학과)
Bae Hveon-Deok (충북대학교 전기전자컴퓨터공학부)
Publication Information
The Journal of the Acoustical Society of Korea / v.24, no.5, 2005 , pp. 238-247 More about this Journal
Abstract
In this Paper. we Presents subband design techniques of a compensating filter and adaptive feedback canceller for the digital hearing aid. The sensorineural hearing loss has a hearing threshold that shows a nonlinear characteristic in frequency domain. and its compensation suffers from an echo that produced by an undesired time varying feedback path. Therefore. the digital hearing aid requires the compensator that can adjust gains nonlinearly in frequency bands and eliminate the echo rapidly In the Proposed digital hearing aid. the compensating filter is designed by the adaptive system identification method in subband structure, and the adaptive feedback canceller is designed by the subband affine projection algorithm. The designed compensation filter can control the nonlinear gain in each subband respectively, therefore precise compensation is possible. And the feedback canceller using the subband adaptive filter achieves fast convergence rate. The Performances of the Proposed method are verified by computer simulations as comparing with the behaviors of the previous trials.
Keywords
Sensorineural Hearing Loss; Adaptive Feedback Canceller; Affne Projection Algorithm; Subband Structure;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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