打破波浪的中频声学跟踪
Ryan Saenger1, Luc Lenain1, William S Hodgkiss1
1Scripps Institution of Oceanography, University of California San Diego, La Jolla, California 92093, USArsaenger@ucsd.edu, llenain@ucsd.ed, whodgkiss@ucsd.edu.
JASA express letters
|June 3, 2024
概括
使用光束成形,可以对大型表面波折断进行声学检测. 这项研究开发了一种使用子数组交叉相关的方法,以准确追踪波浪轨迹,匹配空中观测.
科学领域:
- 海洋学 海洋学 海洋学
- 声学 声学 在声学方面
- 波动动力学 波动动力学
背景情况:
- 表面波浪破裂是海洋噪音的重要来源.
- 一个中频平面阵列 (130米深,1米光圈) 可以在5-6 kHz声学检测这些事件.
- 由于数组几何结构,光束成形本身在准确追踪源方面存在局限性.
研究的目的:
- 开发和验证一种方法,准确追踪大型表面波破裂事件的轨迹.
- 在这种情况下,克服传统光束成型用于源定位的局限性.
主要方法:
- 将平面数组划分为子数组.
- 将每个子阵列向声源传输.
- 计算子数组束的时间交叉相关性,以估计源位置.
主要成果:
- 成功估计了波破事件的源轨迹.
- 估计的轨迹与空中图像中观察到的轨迹非常相匹配.
- 与光束成形单独相比,交叉关联方法提高了跟踪精度.
结论:
- 使用子阵列交叉相关技术,可以对表面波断进行声学跟踪.
- 这种方法提供了准确的轨迹估计,补充视觉观测.
- 这些发现对海洋表面过程的声学监测有意义.
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