海洋压缩空气源阵列声场特征从海上测量:远程传播)
Kun Li1, Natalia Sidorovskaia2
1John W. Deming Department of Medicine, School of Medicine, Tulane University, New Orleans, Louisiana 70112, USA.
The Journal of the Acoustical Society of America
|September 26, 2024
概括
海洋地震调查会产生远距离传输的声音. 这项研究测量了声传播,发现由于接收器深度和海底条件等因素,声传播水平可能会随范围的意想不到地增加.
科学领域:
- 海洋学 海洋学 海洋学
- 海洋声学 海洋声学
- 地震勘探的地震勘探工作
背景情况:
- 海洋地震调查使用压缩空气阵列,产生大量的声能.
- 了解远程声学传播对于环境影响评估和地球物理调查至关重要.
研究的目的:
- 测量海洋地震源阵列的三维声学场.
- 分析远程声学传播特征,包括接收的声压和声暴露水平 (SEL).
- 调查接收器深度,阵列方向和传播条件对声信号的影响.
主要方法:
- 2007年在墨西哥湾北部进行了全面的实验.
- 使用标准的海洋压缩空气源阵列测量声场.
- 收集了各种范围和深度收到的声压水平和SEL的数据.
主要成果:
- 收到的峰值压力水平和SEL表现出与范围的非单调 (振荡) 行为,在更长的距离上增加了10dB.
- 在20公里之外,最浅的水音箱的声级超过了更深的水音箱的3-10dB,这表明了表面管道效应.
- 与范围依赖条件相比,范围独立的浴度测量导致接收的声级大约高出4dB.
结论:
- 来自地震阵列的远程声学传播是复杂的,并受到环境因素的影响.
- 实验数据为验证声源和传播模型提供了有价值的数据集.
- 准确的建模对于预测地震源远场中的声压和SEL至关重要.
相关概念视频
01:06Echo
494
The human ear cannot distinguish between two sources of sound if they happen to reach within a specific time interval, typically 0.1 seconds apart. More than this, and they are perceived as separate sources.
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case,...
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case,...
494
01:09Deriving the Speed of Sound in a Liquid
482
As with waves on a string, the speed of sound or a mechanical wave in a fluid depends on the fluid's elastic modulus and inertia. The two relevant physical quantities are the bulk modulus and the density of the material. Indeed, it turns out that the relationship between speed and the bulk modulus and density in fluids is the same as that between the speed and the Young's modulus and density in solids.
The speed of sound in fluids can be derived by considering a mechanical wave...
The speed of sound in fluids can be derived by considering a mechanical wave...
482