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Passive bottom reflection-loss estimation using ship noise and a vertical line array

TitlePassive bottom reflection-loss estimation using ship noise and a vertical line array
Publication TypeJournal Article
Year of Publication2017
AuthorsMuzi L., Siderius M., Verlinden C.M
JournalJournal of the Acoustical Society of America
Volume141
Pagination4372-4379
Date Published2017/06
Type of ArticleArticle
ISBN Number0001-4966
Accession NumberWOS:000403467300040
Keywordsambient-noise; bayesian geoacoustic inversion; Coherence; ocean; opportunity; single hydrophone; wind-driven
Abstract

An existing technique for passive bottom-loss estimation from natural marine surface noise (generated by waves and wind) is adapted to use noise generated by ships. The original approach-based on beamforming of the noise field recorded by a vertical line array of hydrophones-is retained; however, additional processing is needed in order for the field generated by a passing ship to show features that are similar to those of the natural surface-noise field. A necessary requisite is that the ship position, relative to the array, varies over as wide a range of steering angles as possible, ideally passing directly over the array to ensure coverage of the steepest angles. The methodology is illustrated through simulation and applied to data from a field experiment conducted offshore of San Diego, CA in 2009. (C) 2017 Acoustical Society of America.

DOI10.1121/1.4985122
Student Publication: 
Yes
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