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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
Publication date2008
Host publicationProceedings of ISMA2008 : international conference on noise and vibration engineering
EditorsP. Sas, B. Bergen
Place of PublicationLeuven
PublisherISMA
Pages2981-2991
Number of pages11
ISBN (Print)978-90-73802-86-5
<mark>Original language</mark>English
EventInternational Conference on Noise and Vibration Engineering - Leuven, Belgium

Conference

ConferenceInternational Conference on Noise and Vibration Engineering
CountryBelgium
CityLeuven
Period15/09/0817/09/08

Conference

ConferenceInternational Conference on Noise and Vibration Engineering
CountryBelgium
CityLeuven
Period15/09/0817/09/08

Abstract

In this paper the problem of coupling of acoustic Sources in a confined space in 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 is not a matter shows that coupling will effectively change the strength of sources and hence the required voltage signals to drive the loudspeakers. The developed model is an improved description of the sound pressure as well as 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 chan-e the radiation impedance of other sources.