Synthetic array processing of ocean ambient noise for higher resolution seabed bottom loss estimation | Zendy

Martin Siderius | Zendy; Lanfranco Muzi | Zendy; Chris H. Harrison | Zendy; Peter L. Nielsen | Zendy

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Synthetic array processing of ocean ambient noise for higher resolution seabed bottom loss estimation

Author(s) -

Martin Siderius,

Lanfranco Muzi,

Chris H. Harrison,

Peter L. Nielsen

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 - 10.1121/1.4774074

Subject(s) - seabed , transmission loss , ocean bottom , coherence (philosophical gambling strategy) , geology , noise (video) , acoustics , ambient noise level , computer science , oceanography , physics , seismology , sound (geography) , quantum mechanics , artificial intelligence , image (mathematics)

Predicting transmission loss in the ocean often strongly depends on the bottom loss. Bottom loss can be estimated using ocean noise and vertical array beam-forming [Harrison and Simons, J. Acoust. Soc. Am. 112, 1377-1389 (2002)]. With finite length arrays, the bottom loss estimate using this method can be smoothed due to beam widths. This paper describes how the noise coherence function can be synthetically expanded, which is similar to extending the length of an array. A full wave ocean noise model is used to demonstrate, in simulation, how this leads to improvements in the resolution of bottom loss estimates.

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