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被动移动源海洋声学断层扫描与不确定性量化使用机会船的相对到达时间

Heriberto J Vazquez¹, Bruce D Cornuelle¹, William S Hodgkiss¹

¹Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, USA.

The Journal of the Acoustical Society of America

|February 13, 2026

概括

海洋声学断层扫描使用船舶噪声来估计圣塔巴巴拉海峡的声速. 这种方法很有前途,但不确定性比传统技术高.

科学领域:

海洋学海洋学海洋学
声学声学在声学方面
地质物理学地质物理学

背景情况:

海洋声学断层扫描通常使用受控源和绝对旅行时间.
机会船提供了一个潜在的替代声源用于声学断层扫描.
了解沿海环境中的声音传播对于各种应用至关重要.

研究的目的:

使用辐射船舶噪声进行海洋声学断层扫描反转.
量化来自相对到达时间的声音速度估计中的不确定性.
为了研究表面反射和阵列几何学对短距离断层扫描的影响.

主要方法:

利用了两个垂直线阵列接收的船舶辐射噪声的相对到达时间.
在圣巴巴拉海峡进行声学断层扫描逆转.
使用根平均平方 (rms) 差异量化不确定性.

主要成果:

使用船舶噪声估计的声速与之前的研究 (0.71 m/s rms 差异) 有很好的一致性.
相对到达时间估计的不确定性较高 (1.42 m/s rms) 与绝对旅行时间 (0.89 m/s rms) 相比.
观察到直接和表面反射到达之间的深度变化的干扰,影响时间延迟估计.

结论:

海洋声学断层扫描与船舶噪声是可行的声速估计.
不确定性量化对于解释这种方法的结果至关重要.
干扰效应需要在接近表面的源头的短距离断层扫描中仔细考虑.

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