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 language | English |
|---|---|
| Title of host publication | 2013 IEEE 56th International Midwest Symposium on Circuits and Systems, MWSCAS 2013 |
| Pages | 983-986 |
| Number of pages | 4 |
| DOIs | |
| Publication status | Published - Dec 1 2013 |
| Externally published | Yes |
| Event | 2013 IEEE 56th International Midwest Symposium on Circuits and Systems, MWSCAS 2013 - Columbus, OH, United States Duration: Aug 4 2013 → Aug 7 2013 |
Publication series
| Name | Midwest Symposium on Circuits and Systems |
|---|
Conference
| Conference | 2013 IEEE 56th International Midwest Symposium on Circuits and Systems, MWSCAS 2013 |
|---|---|
| Country | United States |
| City | Columbus, OH |
| Period | 8/4/13 → 8/7/13 |
Fingerprint
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering
Cite this
On delay-based technique for acoustic feedback cancellation in digital hearing aids. / Akhtar, Muhammad Tahir; Nishihara, Akinori.
2013 IEEE 56th International Midwest Symposium on Circuits and Systems, MWSCAS 2013. 2013. p. 983-986 6674816 (Midwest Symposium on Circuits and Systems).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - On delay-based technique for acoustic feedback cancellation in digital hearing aids
AU - Akhtar, Muhammad Tahir
AU - Nishihara, Akinori
PY - 2013/12/1
Y1 - 2013/12/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84893184648&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84893184648&partnerID=8YFLogxK
U2 - 10.1109/MWSCAS.2013.6674816
DO - 10.1109/MWSCAS.2013.6674816
M3 - Conference contribution
AN - SCOPUS:84893184648
SN - 9781479900664
T3 - Midwest Symposium on Circuits and Systems
SP - 983
EP - 986
BT - 2013 IEEE 56th International Midwest Symposium on Circuits and Systems, MWSCAS 2013
ER -