| On the sound field of a resilient disk in free space. | |
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MedLine Citation:
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PMID: 18396997 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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Radiation characteristics are calculated for a circular planar sound source in free space with a uniform surface pressure distribution, which can be regarded as a freely suspended membrane with zero mass and stiffness. This idealized dipole source is shown to have closed form solutions for its far-field pressure response and radiation admittance. The latter is found to have a simple mathematical relationship with the radiation impedance of a rigid piston in an infinite baffle. Also, a single expansion is derived for the near-field pressure field, which degenerates to a closed form solution on the axis of symmetry. From the normal gradient of the surface pressure, the surface velocity is calculated. The near-field expression is then generalized to an arbitrary surface pressure distribution. It is shown how this can be used as a simplified solution for a rigid disk in free space or a more realistic sound source such as pre-tensioned membrane in free space with non-zero mass and a clamped rim. |
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Authors:
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Tim Mellow |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Journal of the Acoustical Society of America Volume: 123 ISSN: 1520-8524 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2008 Apr |
Date Detail:
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Created Date: 2008-04-09 Completed Date: 2008-05-27 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7503051 Medline TA: J Acoust Soc Am Country: United States |
Other Details:
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Languages: eng Pagination: 1880-91 Citation Subset: - |
Affiliation:
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Nokia UK Ltd., Nokia House, Summit Avenue, Farnborough, Hants GU14 0NG, England. tim.mellow@nokia.com |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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