Multi-channel active noise cancellation using the DSP56001

  • Authors:

  • R. W. Stewart;R. Duncan;S. Weiss

  • Affiliations:

  • Dept. Electronic and Electrical Engineering, University of Strathclyde, Glasgow, Scotland, UK;Dept. Electronic and Electrical Engineering, University of Strathclyde, Glasgow, Scotland, UK;Dept. Electronic and Electrical Engineering, University of Strathclyde, Glasgow, Scotland, UK

  • Venue:
  • ICASSP'93 Proceedings of the 1993 IEEE international conference on Acoustics, speech, and signal processing: plenary, special, audio, underwater acoustics, VLSI, neural networks - Volume I
  • Year:
  • 1993

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Abstract

This paper reports on the performance of a portable active noise cancellation system based around a PC hosted 20MHz Motorola DSP56001 processor with a 4 channel analogue I/O board connected to the real world via standard consumer audio components. The system will perform active noise cancellation over the frequency range 65-500Hz. 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.