A Variable Step-Size Feedback Cancellation Algorithm Based on GSAP for Digital Hearing Aids
Hongsub An, Hyeon-Min Shim, Jang-Woo Kwon, Sangmin Lee · IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences · 2014
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.