| Wide-band attenuation measurements in New Jersey Shelf sediments. | |
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MedLine Citation:
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PMID: 19063041 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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The frequency dependence of attenuation in marine sediments is investigated using in situ measurements from a wide-band acoustic probe system during the Shallow Water 2006 (SW06) experiment. Direct-path pulse propagation measurements within the 10-80 kHz frequency band show linear frequency dependency of attenuation in dBm at two silty-sand sites on the New Jersey Shelf. The measurements also show evidence of mild velocity dispersion within the 10-80 kHz frequency band. The measured attenuation and velocity dispersion curves are in good agreement with those predicted by an extended Biot theory for sediments with a distribution of pore sizes [Yamamoto and Turgut, J. Acoust. Soc. Am. 83, 1744-1751 (1988)]. Attenuation roll-off measurements (dBm kHz) were also conducted within a 3-8 kHz frequency band using a chirp-sonar subbottom profiler. The comparable levels of attenuation roll-off are observed from the chirp sonar and acoustic probe measurements. [Work supported by ONR.]. |
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Authors:
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Altan Turgut |
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: 124 ISSN: 1520-8524 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2008 Oct |
Date Detail:
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Created Date: 2008-12-09 Completed Date: - 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: 2468 Citation Subset: IM |
Affiliation:
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Acoust. Div., Naval Res. Lab., Washington, DC 20375, turgut@nrl.navy.mil. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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