Active listening room compensation for massive multichannel sound reproduction systems using wave-domain adaptive filtering

Journal article
(Original article)


Publication Details

Author(s): Spors S, Buchner H, Rabenstein R, Herbordt W
Journal: Journal of the Acoustical Society of America
Publisher: Acoustical Society of America
Publication year: 2007
Volume: 122
Journal issue: 1
Pages range: 354-369
ISSN: 0001-4966


Abstract


The acoustic theory for multichannel sound reproduction systems usually assumes free-field conditions for the listening environment. However, their performance in real-world listening environments may be impaired by reflections at the walls. This impairment can be reduced by suitable compensation measures. For systems with many channels, active compensation is an option, since the compensating waves can be created by the reproduction loudspeakers. Due to the time-varying nature of room acoustics, the compensation signals have to be determined by an adaptive system. The problems associated with the successful operation of multichannel adaptive systems are addressed in this contribution. First, a method for decoupling the adaptation problem is introduced. It is based on a generalized singular value decomposition and is called eigenspace adaptive filtering. Unfortunately, it cannot be implemented in its pure form, since the continuous adaptation of the generalized singular value decomposition matrices to the variable room acoustics is numerically very demanding. However, a combination of this mathematical technique with the physical description of wave propagation yields a realizable multichannel adaptation method with good decoupling properties. It is called wave domain adaptive filtering and is discussed here in the context of wave field synthesis. © 2007 Acoustical Society of America.



FAU Authors / FAU Editors

Rabenstein, Rudolf Prof. Dr.
Lehrstuhl für Multimediakommunikation und Signalverarbeitung


How to cite

APA:
Spors, S., Buchner, H., Rabenstein, R., & Herbordt, W. (2007). Active listening room compensation for massive multichannel sound reproduction systems using wave-domain adaptive filtering. Journal of the Acoustical Society of America, 122(1), 354-369. https://dx.doi.org/10.1121/1.2737669

MLA:
Spors, Sascha, et al. "Active listening room compensation for massive multichannel sound reproduction systems using wave-domain adaptive filtering." Journal of the Acoustical Society of America 122.1 (2007): 354-369.

BibTeX: 

Last updated on 2018-07-08 at 02:11

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