A Variable Step-Size Feedback Cancellation Algorithm Based on GSAP for Digital Hearing Aids

Hongsub AN  Hyeonmin SHIM  Jangwoo KWON  Sangmin LEE  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E97-A   No.7   pp.1615-1618
Publication Date: 2014/07/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E97.A.1615
Type of Manuscript: LETTER
Category: Digital Signal Processing
acoustic feedback,  hearing aids,  adaptive filter,  variable step-size,  affine projection,  global speech absence probability,  

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Acoustic feedback is a major complaint of hearing aid users. Adaptive filters are a common method for suppressing acoustic feedback in digital hearing aids. In this letter, we propose a new variable step-size algorithm for normalized least mean square and an affine projection algorithm to combine with a variable step-size affine projection algorithm and global speech absence probability in an adaptive filter. The computer simulation used to test the proposed algorithm results in a lower misalignment error than the comparison algorithm at a similar convergence rate. Therefore, the proposed algorithm suggests an effective solution for the feedback suppression system of digital hearing aids.