船舶噪声的相干处理用于海洋监测。

Coherent processing of shipping noise for ocean monitoring.

机构信息

School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0405, USA.

出版信息

J Acoust Soc Am. 2013 Feb;133(2):EL108-13. doi: 10.1121/1.4776775.

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.

摘要

在加利福尼亚州圣地亚哥附近的浅水区（水深约 150 米），连续六天使用两个相距 450 米的垂直线列（VLA）记录环境噪声。记录主要由非平稳和非均匀宽带航运噪声（250 Hz 至 1.5 kHz）组成。通过减轻离散航运事件的影响并使用基于数据的导向矢量进行阵列波束形成，从 VLA 之间的环境噪声相关中提取出稳定的相干噪声波前。该过程允许在六天内跟踪这些相干波前的到达时间变化，这可能有助于开发未来的被动声纳层析成像系统。