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Resonance frequency shift of an acoustic chamber containing a rigid sphereThe resonance frequency shift of an acoustic rectangular chamber due to the presence of a rigid sphere has been measured for l = 1,2 modes as a function of sphere size and position. The frequency shift is the results of volume exclusion and wave scattering. An analytical Green's function calculation was used to explain the data, providing excellent agreement between the measured and the calculated values. Also reported are similar measurements for a thin disk and the ratio of second harmonic to fundamental pressure as a function of sphere position. The measurement shows that the sphere reduces the first harmonic content, with sharply peaked suppression minima at specific sphere positions.
Document ID
19820057595
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Leung, E.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Lee, C. P.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Jacobi, N.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Wang, T. G.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)
Date Acquired
August 10, 2013
Publication Date
August 1, 1982
Publication Information
Publication: Acoustical Society of America
Subject Category
Acoustics
Accession Number
82A41130
Funding Number(s)
CONTRACT_GRANT: NAS7-100
Distribution Limits
Public
Copyright
Other

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