Active noise control in a free field with virtual sensors
Date
2001
Authors
Kestell, C.
Cazzolato, B.
Hansen, C.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
Journal of the Acoustical Society of America, 2001; 109(1):232-243
Statement of Responsibility
Colin D. Kestell, Ben S. Cazzolato, and Colin H. Hansen
Conference Name
Abstract
The zone of local control around a "virtual energy density sensor" is compared with that offered by an actual energy density sensor, a single microphone, and a virtual microphone. Intended as an introduction to the concept of forward difference prediction and a precursor to evaluating the virtual sensor control algorithms in damped enclosures, this paper investigates an idealized scenario of a single primary sound source in a free-field environment. An analytical model is used to predict the performance of the virtual error sensors and compare their control performance with their physical counterparts. The model is then experimentally validated. The model shows that in general the virtual energy density sensor outperforms the actual energy density sensor, the actual microphone, and the virtual microphone in terms of centering a practically sized zone of local control around an observer who is remotely located from any physical sensors. However, in practice, the virtual sensor algorithms are shown to be sensitive (by varying degrees) to short wavelength spatial pressure variations of the primary and secondary sound fields.
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Dissertation Note
Provenance
Description
© 2001 Acoustical Society of America.