Acoustic feedback neutralization in digital hearing aids-A two adaptive filters-based solution

Muhammad Tahir Akhtar, Akinori Nishihara

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Citations (Scopus)

Abstract

In this paper, we propose a novel solution for continuous acoustic feedback neutralization in the digital hearing aids. The proposed method is based on two adaptive filters working in tandem. The error signal of the first adaptive filter is used as a desired response for the second adaptive filter being excited by a low-level (constant) probe signal. Initially at the start up, the first adaptive filter gives a fast convergence, however, its input and desired response are correlated with each other and it may converge to a biased solution at the steady-state. On the other hand, the second adaptive filter, though converging slowly being excited by a low-level probe signal, would give a good steady-state estimate of the acoustic feedback path. A novel strategy is proposed to exchange the weights between the two adaptive filters, such that the misconvergence of the first adaptive filter is avoided, as well as the initial convergence of the second adaptive filter is improved. Computer simulations demonstrate the improved performance of the proposed method.

Original languageEnglish
Title of host publication2013 IEEE International Symposium on Circuits and Systems, ISCAS 2013
Pages529-532
Number of pages4
DOIs
Publication statusPublished - Sep 9 2013
Event2013 IEEE International Symposium on Circuits and Systems, ISCAS 2013 - Beijing, China
Duration: May 19 2013May 23 2013

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems

Conference

Conference2013 IEEE International Symposium on Circuits and Systems, ISCAS 2013
CountryChina
CityBeijing
Period5/19/135/23/13

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Acoustic feedback neutralization in digital hearing aids-A two adaptive filters-based solution'. Together they form a unique fingerprint.

  • Cite this

    Akhtar, M. T., & Nishihara, A. (2013). Acoustic feedback neutralization in digital hearing aids-A two adaptive filters-based solution. In 2013 IEEE International Symposium on Circuits and Systems, ISCAS 2013 (pp. 529-532). [6571897] (Proceedings - IEEE International Symposium on Circuits and Systems). https://doi.org/10.1109/ISCAS.2013.6571897