Coherent processing of shipping noise for ocean monitoring | Zendy

Shane Lani | Zendy; Karim G. Sabra | Zendy; William S. Hodgkiss | Zendy; W. A. Kuperman | Zendy; Philippe Roux | Zendy

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Coherent processing of shipping noise for ocean monitoring

Author(s) -

Shane Lani,

Karim G. Sabra,

William S. Hodgkiss,

W. A. Kuperman,

Philippe Roux

Publication year - 2013

Publication title -

the journal of the acoustical society of america

Language(s) - English

Resource type - Journals

eISSN - 1520-8524

pISSN - 0001-4966

DOI - 10.1121/1.4776775

Subject(s) - beamforming , noise (video) , ambient noise level , broadband , wavefront , acoustics , tracking (education) , environmental science , computer science , geology , remote sensing , physics , telecommunications , optics , artificial intelligence , psychology , pedagogy , image (mathematics) , sound (geography)

Ambient noise was recorded on two vertical line arrays (VLAs) separated by 450 m and deployed in shallow water (depth ~150 m) off San Diego, CA continuously for 6 days. Recordings were dominated by non-stationary and non-uniform broadband shipping noise (250 Hz to 1.5 kHz). Stable coherent noise wavefronts were extracted from ambient noise correlations between the VLAs during all 6 days by mitigating the effect of discrete shipping events and using array beamforming with data-derived steering vectors. This procedure allows the tracking of arrival-time variations of these coherent wavefronts during 6 days and may help in developing future passive acoustic tomography systems.

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