Active noise control in enclosure with virtual microphone

  • Stéphane Renault GAUS, Université de Sherbrooke, Sherbrooke, Que. J1H 2R1, Canada
  • Franck Rymeyko GAUS, Université de Sherbrooke, Sherbrooke, Que. J1H 2R1, Canada
  • Alain Berry GAUS, Université de Sherbrooke, Sherbrooke, Que. J1H 2R1, Canada
Keywords: active noise control, road traffic, error microphones, virtual microphone, local active noise control, confined spaces, quiet zone, fixed primary sources, propeller-induced aircraft cabin noise, moving primary source, road traffic noise

Abstract

This study concerns local active noise control (ANC) in confined spaces. In cases where an active zone of quiet is intended in an enclosure, it is not always practical to place error microphones in this zone. Error microphones placed on the enclosure walls would sometimes be a more convenient solution. This article discusses the concept of a “virtual” microphone, which consists to generate a quiet zone distant from the error microphone used during control. Two virtual microphone algorithms are presented and experimentally tested. Such a virtual microphone technique has been implemented in the past for essentially fixed primary sources with respect to the enclosure (e.g. active control of propeller-induced aircraft cabin noise). The virtual microphone technique is especially examined here in the context of a moving primary source with respect to the enclosure (such as road traffic noise)
Published
2000-09-01
How to Cite
1.
Renault S, Rymeyko F, Berry A. Active noise control in enclosure with virtual microphone. Canadian Acoustics [Internet]. 2000Sep.1 [cited 2019Oct.16];28(3):72-3. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1296
Section
Proceedings of the Acoustics Week in Canada