Acoustic response of a rectangular levitator with orifices
作者:
Michael El‐Raheb,
Paul Wagner,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1990)
卷期:
Volume 88,
issue 5
页码: 2437-2449
ISSN:0001-4966
年代: 1990
DOI:10.1121/1.400084
出版商: Acoustical Society of America
关键词: ACOUSTIC WAVEGUIDES;RECTANGULAR CONFIGURATION;ORIFICES;BOUNDARY CONDITIONS;SOUND PRESSURE;EIGENFUNCTIONS;CAVITY RESONATORS;LEVITATION
数据来源: AIP
摘要:
The acoustic response of a rectangular cavity to speaker‐generated excitation through waveguides terminating at orifices in the cavity walls is analyzed. To find the effects of orifices, acoustic pressure is expressed by eigenfunctions satisfying Neumann boundary conditions as well as by those satisfying Dirichlet ones. Some of the excess unknowns can be eliminated by point constraints set over the boundary, by appeal to Lagrange undetermined multipliers. The resulting transfer matrix must be further reduced by partial condensation to the order of a matrix describing unmixed boundary conditions. If the cavity is subjected to an axial temperature dependence, the transfer matrix is determined numerically.
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