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Analysis of the behavior of coupled loudspeakers in a MIMO ANC system in an enclosure

Research output: Contribution in Book/Report/ProceedingsPaper

Published

Associated organisational unit

Publication date2010
Host publicationControl Applications (CCA), 2010 IEEE International Conference on
Place of publicationNew York
PublisherIEEE
Pages228-233
Number of pages6
ISBN (Electronic)978-1-4244-5363-4
ISBN (Print)978-1-4244-5362-7
Original languageEnglish

Conference

ConferenceIEEE International Conference on Control Applications Part of 2010 IEEE Multi-Conference on Systems and Control
CountryJapan
CityYokohama
Period8/09/1010/09/10

Publication series

NameIEEE International Conference on Control Applications
PublisherIEEE
ISSN (Print)1085-1992

Conference

ConferenceIEEE International Conference on Control Applications Part of 2010 IEEE Multi-Conference on Systems and Control
CountryJapan
CityYokohama
Period8/09/1010/09/10

Abstract

In this paper the problem of coupling of acoustic sources in a confined space is treated. By considering the coupling of sources in a rectangular enclosure the set of coupled equations governing the acoustical behavior of enclosure are solved. The resulted model can be used to analyze the behavior of a multi-input multi-output (MIMO) active noise control (ANC) system in real application where coupling of sources can not be neglected. Comparison of results to the case that coupling will be ignored among loudspeakers shows that coupling will effectively change the strength of sources and hence the required voltage signals to drive the loudspeakers. The developed model gives an improved description of the acoustic environment inside the rectangular enclosure, especially in an ANC system when sources are placed in a fraction of wavelength and the interaction among sources will change the radiation impedance of other sources.