Delay-performance tradeoffs in causal microphone array processing

Ryan M. Corey, Naoki Tsuda, Andrew C. Singer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In real-time listening enhancement applications, such as hearing aid signal processing, sounds must be processed with no more than a few milliseconds of delay to sound natural to the listener. Listening devices can achieve better performance with lower delay by using microphone arrays to filter acoustic signals in both space and time. Here, we analyze the tradeoff between delay and squared-error performance of causal multichannel Wiener filters for microphone array noise reduction. We compute exact expressions for the delay-error curves in two special cases and present experimental results from real-world microphone array recordings. We find that delay-performance characteristics are determined by both the spatial and temporal correlation structures of the signals.

Original languageEnglish (US)
Title of host publication16th International Workshop on Acoustic Signal Enhancement, IWAENC 2018 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages481-485
Number of pages5
ISBN (Electronic)9781538681510
DOIs
StatePublished - Nov 2 2018
Event16th International Workshop on Acoustic Signal Enhancement, IWAENC 2018 - Tokyo, Japan
Duration: Sep 17 2018Sep 20 2018

Publication series

Name16th International Workshop on Acoustic Signal Enhancement, IWAENC 2018 - Proceedings

Other

Other16th International Workshop on Acoustic Signal Enhancement, IWAENC 2018
CountryJapan
CityTokyo
Period9/17/189/20/18

Keywords

  • Audio enhancement
  • Audio source separation
  • Beamforming
  • Hearing aids
  • Microphone arrays
  • Noise reduction

ASJC Scopus subject areas

  • Signal Processing
  • Acoustics and Ultrasonics

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