Noise generation by bubbles formed in breaking waves
Noise generation by bubbles formed in breaking waves
复制标题
破碎波浪中形成的气泡产生噪音
DOI：
10.1007/978-94-009-3017-9_33
复制
发表时间：
1988
期刊：
影响因子：
3
通讯作者：
R. Heitmeyer
中科院分区：
文献类型：
--
作者：
R. Hollett;R. Heitmeyer
提出了一个模型，描述了高频噪声的交叉频谱所产生的气泡在破碎波的振动。假设气泡振动满足线性模型，激励发生在气泡形成的时刻。在对气泡是如何形成的以及振动是如何被激发的缺乏清楚了解的情况下，我们假设了两种激发机制。对应于这些激励机制的噪声谱进行评估下，使用一个特定的风速的物理参数的估计，一个简化的传播假设。虽然不同，但这两种噪声谱在0.66至10 kHz的频率范围内具有与相应风速的Wenz谱相当的水平。
A model is presented that describes the high-frequency noise cross-spectrum resulting from the vibrations of bubbles generated in breaking waves. The bubble vibrations are assumed to satisfy a linear model with the excitation occurring at the moment the bubble is formed. In the absence of a clear understanding of precisely how the bubbles are formed, and hence how the vibrations are excited, we postulate two excitation mechanisms. The noise spectra corresponding to each of these excitation mechanisms are evaluated under a simplified propagation assumption using estimates of the physical parameters for a particular wind speed. Although different, both noise spectra have levels comparable to the Wenz spectrum for the corresponding wind speed over the frequency range 0.66 to 10 kHz.