Multi-channel active noise cancellation using the DSP56001 (digital signal processor)

Author

Stewart, R.W. ; Duncan, R. ; Weiss, S.

Author_Institution

Dept. of Electron. & Electr. Eng., Strathclyde Univ., Glasgow, UK

Volume

1

fYear

1993

fDate

27-30 April 1993

Firstpage

185

Abstract

The authors report on the performance of a portable active noise cancellation (ANC) system based around a PC hosted 20-MHz Motorola DSP56001 processor with a four-channel analog input/output (I/O) board connected to the real world via standard consumer audio components. The system will perform active noise cancellation over the frequency range of 65-500 Hz. Quantitative results are presented for the cancellation of single tone noise and of narrowband noise, and a measure of the ANC power spectrum is calculated for various parameters of the filtered-X LMS algorithm in different acoustic environments. Qualitative results based on human hearing perception of the attenuation of various narrowband and real world noise sources are also discussed.<>

Keywords

digital signal processing chips; least squares approximations; noise abatement; 65 to 500 Hz; active noise cancellation; digital signal processor; filtered-X LMS algorithm; narrowband noise; performance; single tone noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1993. ICASSP-93., 1993 IEEE International Conference on

Conference_Location

Minneapolis, MN, USA

ISSN

1520-6149

Print_ISBN

0-7803-7402-9

Type

conf

DOI

10.1109/ICASSP.1993.319086

Filename

319086