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A boundary element approach to optimization of active noise control sources on three-dimensional structuresThis paper presents the theoretical development of an approach to active noise control (ANC) applicable to three-dimensional radiators. The active noise control technique, termed ANC Optimization Analysis, is based on minimizing the total radiated power by adding secondary acoustic sources on the primary noise source. ANC Optimization Analysis determines the optimum magnitude and phase at which to drive the secondary control sources in order to achieve the best possible reduction in the total radiated power from the noise source/control source combination. For example, ANC Optimization Analysis predicts a 20 dB reduction in the total power radiated from a sphere of radius at a dimensionless wavenumber ka of 0.125, for a single control source representing 2.5 percent of the total area of the sphere. ANC Optimization Analysis is based on a boundary element formulation of the Helmholtz Integral Equation, and thus, the optimization analysis applies to a single frequency, while multiple frequencies can be treated through repeated analyses.
Document ID
19910062593
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Cunefare, K. A.
(Pennsylvania State Univ. University Park, PA, United States)
Koopmann, G. H.
(Pennsylvania State University University Park, United States)
Date Acquired
August 14, 2013
Publication Date
July 1, 1991
Publication Information
Publication: ASME, Transactions, Journal of Vibration and Acoustics
Volume: 113
ISSN: 0739-3717
Subject Category
Acoustics
Accession Number
91A47216
Distribution Limits
Public
Copyright
Other

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