Model study of noise field in the human chest due to turbulent flow in a larger blood vessel
Model study of noise field in the human chest due to turbulent flow in a larger blood vessel
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DOI：
10.1016/s0889-9746(03)00056-2
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发表时间：
2003-07-01
影响因子：
3.6
通讯作者：
Borisyuk, AO
中科院分区：
文献类型：
--
作者：
Borisyuk, AO
对人体较大血管产生的噪声和胸部的噪声传输进行了建模和研究。在此过程中，考虑了噪声源的随机统计性质、基本血管特性和人体胸部结构的主要特征。此外，基本血管参数变化的影响被认为是研究血管狭窄的声学效应的第一个方法。对合成声场的分析表明，它与适当实验中记录的声场相似。发现基本容器参数的变化会引起声级的相应变化，并在声功率谱中产生新的频率分量。结果表明，轻微加厚容器的声功率与原正常容器的流动雷诺数的4次方和容器直径比的8次方近似成正比。(C)2003爱思唯尔有限公司。保留所有权利。
An acoustic generation of noise by a larger human blood vessel and noise transmission in the thorax is modelled and studied. In making this, the random statistical nature of the noise sources, the basic vessel properties and the main features of the human chest structure are taken into account. Also the effects of changes in the basic vessel parameters are considered as a first approach to study acoustic effects of a vascular stenosis. The analysis of the resultant acoustic field reveals its similarity to the acoustic fields recorded in the appropriate experiments. The variations in the basic vessel parameters are found to cause the corresponding changes in the sound level and the production of new frequency components in the acoustic power spectrum. The acoustic power from a slightly thickened vessel is shown to be approximately proportional to the fourth power of the flow Reynolds number in the originally normal vessel and the eighth power of the ratio of the vessel diameters. (C) 2003 Elsevier Ltd. All rights reserved.