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

Hongsub AN  Hyeonmin SHIM  Jangwoo KWON  Sangmin LEE  

Publication
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
Keyword: 
acoustic feedback,  hearing aids,  adaptive filter,  variable step-size,  affine projection,  global speech absence probability,  

Full Text: PDF(685.7KB)>>
Buy this Article




Summary: 
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.