Inversion of seabed attenuation using time-warping of close range data | Zendy

Juan Zeng | Zendy; N. Ross Chapman | Zendy; Julien Bonnel | Zendy

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Inversion of seabed attenuation using time-warping of close range data

Author(s) -

Juan Zeng,

N. Ross Chapman,

Julien Bonnel

Publication year - 2013

Publication title -

the journal of the acoustical society of america

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.619

H-Index - 187

eISSN - 1520-8524

pISSN - 0001-4966

DOI - 10.1121/1.4822421

Subject(s) - seabed , attenuation , geology , acoustics , image warping , hydrophone , amplitude , geodesy , inversion (geology) , seismology , optics , physics , computer science , oceanography , artificial intelligence , tectonics

An inversion scheme based on time-warping is presented for estimating seabed sound attenuation from modal dispersion of close-range single-hydrophone data. The dispersion information is extracted directly from the warped signal spectrum. Seabed sound speed and density are inverted from the modal group velocity curves, and the attenuation is inverted from the normalized modal amplitudes. The method is applied to experimental data collected in the Yellow Sea of China during the winter of 2002. The inverted sound speed and density are consistent with the sand-silt-clay sediment at the site, and the attenuation is nonlinear over the frequency band from 125-500 Hz.

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