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相关概念视频

Deriving the Speed of Sound in a Liquid01:09

Deriving the Speed of Sound in a Liquid

898
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...
898

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Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing
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使用新的源级函数来估计沉积物特性,用于从长期档案数据中得出的风力驱动的水下声音.

S Bruce Martin1, Martin Siderius2

  • 1JASCO Applied Sciences (Canada), Ltd., Dartmouth, Nova Scotia, Canada.

The Journal of the Acoustical Society of America
|January 13, 2026
PubMed
概括

新的研究模型海洋环境声音来自风驱动的波浪. 这为声纳,环境评估和音景建模提供了准确的源级,提高了我们对水下声学的理解.

科学领域:

  • 海洋学 海洋学 海洋学
  • 声学 声学 在声学方面
  • 环境科学 环境科学

背景情况:

  • 风力驱动的破浪是海洋环境声音的主要来源.
  • 准确的源级对于声音暴露建模,环境影响评估和声纳性能评估至关重要.
  • 现有的模型有局限性,特别是在较低的频率 (<1000 Hz) 和不同的风速.

研究的目的:

  • 为了开发一个精确的源级模型,以风驱动的破裂波下降到100 Hz.
  • 改进海洋环境中环境噪声水平的估计.
  • 根据声学数据提供一种用于估计沉积物特性或风速的工具.

主要方法:

  • 分析了16个长期档案数据集,其中人为噪音最小.
  • 使用基于射线的模型估计特定地点的区域传播损失 (APL).
  • 通过将APL添加到不同风速的中位数接收水平来计算源级别.

主要成果:

  • 为Areic双极源级获得了一种新的方程.
  • 源水位随着风速的加倍而增加,这与空气-海洋合过程相一致.
  • 该模型提供了精确的源级低至100 Hz.

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结论:

  • 开发的模型准确地估计了风驱动的环境声音水平,用于音景建模.
  • 该模型可用于从声学测量中推断沉积物质或风速.
  • 一个开源实现可用于在海洋声学研究更广泛的应用.