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  • Title: Coherent processing of shipping noise for ocean monitoring.
    Author: Lani SW, Sabra KG, Hodgkiss WS, Kuperman WA, Roux P.
    Journal: J Acoust Soc Am; 2013 Feb; 133(2):EL108-13. PubMed ID: 23363189.
    Abstract:
    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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