On delay-based technique for acoustic feedback cancellation in digital hearing aids

Muhammad Tahir Akhtar, Akinori Nishihara

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

2 Citations (Scopus)

Abstract

This paper proposes an efficient method for continuous adaptive feedback cancellation (AFC) in digital hearing aids. The AFC is achieved by two filters: an adaptive filter to model and track variations in the acoustic feedback path, and a piecewise-fixed filter for feedback neutralization. The proposed method employs a delay-based technique where an appropriate delay is inserted in the signal flow path and an extended-length filter is used for the AFC. An efficient strategy is proposed to check when the AFC filter reaches the optimal solution. Furthermore, the proposed strategy can detect when there is a strong perturbation in the acoustic path, and hence AFC filter is reinitialized. The computer simulations are carried out to demonstrate the effectiveness of the proposed method. We observe that, as compared with the conventional method, the proposed method gives robust performance even in the case of a strong perturbation in the acoustic path.

Original languageEnglish
Title of host publication2013 IEEE 56th International Midwest Symposium on Circuits and Systems, MWSCAS 2013
Pages983-986
Number of pages4
DOIs
Publication statusPublished - Dec 1 2013
Externally publishedYes
Event2013 IEEE 56th International Midwest Symposium on Circuits and Systems, MWSCAS 2013 - Columbus, OH, United States
Duration: Aug 4 2013Aug 7 2013

Publication series

NameMidwest Symposium on Circuits and Systems

Conference

Conference2013 IEEE 56th International Midwest Symposium on Circuits and Systems, MWSCAS 2013
CountryUnited States
CityColumbus, OH
Period8/4/138/7/13

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'On delay-based technique for acoustic feedback cancellation in digital hearing aids'. Together they form a unique fingerprint.

  • Cite this

    Akhtar, M. T., & Nishihara, A. (2013). On delay-based technique for acoustic feedback cancellation in digital hearing aids. In 2013 IEEE 56th International Midwest Symposium on Circuits and Systems, MWSCAS 2013 (pp. 983-986). [6674816] (Midwest Symposium on Circuits and Systems). https://doi.org/10.1109/MWSCAS.2013.6674816