A design for active noise cancellation in the 2cc coupler

Author

Lin, Jiun-Hung ; Wu, Kuang-Jung ; Liu, Ping-Ting ; Chu, William ; Young, Shuenn-Tsong

Author_Institution

National Yang-Ming University, Institute of Biomedical Engineering, No. 155, Sec. 2, Li-Nong St., Shih-Pai, Taipei(112), Taiwan, ROC

Volume

4

fYear

2002

fDate

13-17 May 2002

Abstract

Speech recognition in noise environment is always inefficient for hearing-impaired people who wear hearing aids. Many noise cancellations have been proposed and studied for such an issue. In this paper, we designed a prototype of hearing instrument coupler to imitate the equivalent volume of the human ear, and built a feedforward active noise cancellation system (FANCs) that had the algorithm implemented with a digital signal processor (DSP) controller. The hearing instrument coupler is used to study the FANCs efficiency applied to real hearing aids. It is a chamber with an effective volume of 2cc specified by International Electrotechnical Commission (IEC) standard. The FANCs includes a reference microphone, an error microphone, a canceling loudspeaker and a DSP controller. The results show that the hearing instrument coupler could simulate an ear with hearing aid, and the FANCs could suppress the unwanted noise effectively to enhance speech recognition.

Keywords

Auditory system; Biological system modeling; Biomedical measurements; Ducts; Instruments; Speech processing; Wavelet analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing (ICASSP), 2002 IEEE International Conference on

Conference_Location

Orlando, FL, USA

ISSN

1520-6149

Print_ISBN

0-7803-7402-9

Type

conf

DOI

10.1109/ICASSP.2002.5745514

Filename

5745514