A delay-based dual adaptive filtering solution for acoustic feedback in digital hearing aids

Muhammad Tahir Akhtar, Akinori Nishihara

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

1 Citation (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. An appropriate delay is inserted at the output of the hearing aid, and based-on this delay-based processing, a novel strategy is proposed to exchange the weights between the two adaptive filters. The proposed strategy is such that the misconvergence of the first adaptive filter is avoided, as well as the initial convergence of the second adaptive filter is improved. Extensive computer simulations are carried out which demonstrate the effectiveness of the proposed method.

Original languageEnglish
Title of host publication2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages88-93
Number of pages6
ISBN (Electronic)9781479961207
ISBN (Print)9781479961207
DOIs
Publication statusPublished - Jan 27 2014
Event2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014 - Kuching, Sarawak, Malaysia
Duration: Dec 1 2014Dec 4 2014

Publication series

Name2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014

Conference

Conference2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014
CountryMalaysia
CityKuching, Sarawak
Period12/1/1412/4/14

Fingerprint

Hearing aids
Adaptive filtering
Adaptive filters
Acoustics
Feedback
Computer simulation

ASJC Scopus subject areas

  • Artificial Intelligence
  • Computer Networks and Communications
  • Signal Processing

Cite this

Akhtar, M. T., & Nishihara, A. (2014). A delay-based dual adaptive filtering solution for acoustic feedback in digital hearing aids. In 2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014 (pp. 88-93). [7024431] (2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ISPACS.2014.7024431

A delay-based dual adaptive filtering solution for acoustic feedback in digital hearing aids. / Akhtar, Muhammad Tahir; Nishihara, Akinori.

2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014. Institute of Electrical and Electronics Engineers Inc., 2014. p. 88-93 7024431 (2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014).

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

Akhtar, MT & Nishihara, A 2014, A delay-based dual adaptive filtering solution for acoustic feedback in digital hearing aids. in 2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014., 7024431, 2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014, Institute of Electrical and Electronics Engineers Inc., pp. 88-93, 2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014, Kuching, Sarawak, Malaysia, 12/1/14. https://doi.org/10.1109/ISPACS.2014.7024431
Akhtar MT, Nishihara A. A delay-based dual adaptive filtering solution for acoustic feedback in digital hearing aids. In 2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014. Institute of Electrical and Electronics Engineers Inc. 2014. p. 88-93. 7024431. (2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014). https://doi.org/10.1109/ISPACS.2014.7024431
Akhtar, Muhammad Tahir ; Nishihara, Akinori. / A delay-based dual adaptive filtering solution for acoustic feedback in digital hearing aids. 2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014. Institute of Electrical and Electronics Engineers Inc., 2014. pp. 88-93 (2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014).
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