Coherent processing of shipping noise for ocean monitoring

Citation:
Lani, SW, Sabra KG, Hodgkiss WS, Kuperman WA, Roux P.  2013.  Coherent processing of shipping noise for ocean monitoring. Journal of the Acoustical Society of America. 133:EL108-EL113.

Date Published:

Feb

Keywords:

ambient noise, emergence rate, time, wave-fronts

Abstract:

Ambient noise was recorded on two vertical line arrays (VLAs) separated by 450m and deployed in shallow water (depth similar to 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. (C) 2013 Acoustical Society of America

Notes:

n/a

Website

DOI:

10.1121/1.4776775