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 language | English |
|---|---|
| Title of host publication | 2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 88-93 |
| Number of pages | 6 |
| ISBN (Electronic) | 9781479961207 |
| ISBN (Print) | 9781479961207 |
| DOIs | |
| Publication status | Published - Jan 27 2014 |
| Event | 2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014 - Kuching, Sarawak, Malaysia Duration: Dec 1 2014 → Dec 4 2014 |
Publication series
| Name | 2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014 |
|---|
Conference
| Conference | 2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014 |
|---|---|
| Country | Malaysia |
| City | Kuching, Sarawak |
| Period | 12/1/14 → 12/4/14 |
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ASJC Scopus subject areas
- Artificial Intelligence
- Computer Networks and Communications
- Signal Processing
Cite this
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 proceeding › Conference contribution
}
TY - GEN
T1 - A delay-based dual adaptive filtering solution for acoustic feedback in digital hearing aids
AU - Akhtar, Muhammad Tahir
AU - Nishihara, Akinori
PY - 2014/1/27
Y1 - 2014/1/27
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84946686538&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84946686538&partnerID=8YFLogxK
U2 - 10.1109/ISPACS.2014.7024431
DO - 10.1109/ISPACS.2014.7024431
M3 - Conference contribution
AN - SCOPUS:84946686538
SN - 9781479961207
T3 - 2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014
SP - 88
EP - 93
BT - 2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014
PB - Institute of Electrical and Electronics Engineers Inc.
ER -