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Dependence of acoustic noise emission on the dissipated energy of plunging waves
Oceanologia ( IF 2.6 ) Pub Date : 2019-09-06 , DOI: 10.1016/j.oceano.2019.08.001
Zygmunt Klusek , Maciej Paprota , Wojciech Sulisz , Aneta Zdolska , Sebastian Sorek

The results of experiments performed in a wave flume designed to explore associations between the dissipation of surface wave energy during breaking and acoustic noise emission are presented. The experiments were carried out using tap water in the wave laboratory of the Institute of Hydro-Engineering of the Polish Academy of Sciences, Gdańsk, Poland. In particular, being shown are the parameters of empirical dependency between the dissipated wave energy during plunging and the energy of pre-breaking wave trains. Relationships between wave energy losses in the case of breakers with an amplitude of about 10 cm and the noise acoustic energy in the frequency band from 80 to 12,500 Hz were estimated. Taking into consideration the phenomena of reverberations and propagation in an acoustical waveguide, a numerical model was used for the correction of the observed noise's acoustic spectra. A detailed analysis of the factors affecting the noise level in the semi-enclosed volume allowed us to specify the rate of conversion of the wave energy dissipated during breaking into acoustic energy, which was found to be in the order of 10−8.



中文翻译:

声噪声的发射与突波消散能量的关系

给出了在波浪槽中进行的实验结果,该波浪槽旨在探索破裂期间表面波能量的耗散与声噪声发射之间的关联。实验是在波兰格但斯克的波兰科学院水利工程研究所的波浪实验室中用自来水进行的。特别地,示出了在跌落期间耗散的波能量与预破裂波列的能量之间的经验依赖性的参数。估计了振幅约为10 cm的断路器的波能量损失与80到12,500 Hz频带中的噪声声能之间的关系。考虑到声学波导中的混响和传播现象,数值模型用于校正观察到的噪声的声谱。对影响半封闭体积中的噪声水平的因素的详细分析,使我们可以指定在分解为声能期间耗散的波能的转化率,该速率约为10-8

更新日期:2019-09-06
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