Measurements and simulations on sound propagation above snow field
Measurements and simulations on sound propagation above snow field
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雪场上方声音传播的测量与模拟
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
Doi Teruo
中科院分区：
文献类型：
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作者：
Doi Teruo
对50 cm和100 cm深的两种雪场上的声传播特性进行了现场测量。对于其他应用，还进行了雪场的基本声学特性的测量，如声阻抗，吸声系数和在雪中的传播常数。根据这些测量结果，可以清除以下内容。这两个雪地都有很高的吸声特性。在包含人声主要频谱的频率范围内存在强烈的声衰减。另一方面，高频声音成分，包括乐器音乐，容易和嘈杂的传播以上的雪原。利用实测的雪地表面声阻抗对雪地上的声传播进行了数值模拟。以黄麻和毛巾布为相应材料，对雪场进行了缩尺模型试验的模拟基础。还可以清楚的是，这两个模拟结果与现场测量结果匹配良好。
The field measurements on the sound propagation characteristics above both snowfields with depth of 50 and 100 cm were carried out. For other applications, measurements of basic acoustical properties of the snowfield as acoustic impedance, sound absorption coefficient and propagation constant in the snow were also carried out. From thee measurements, followings could be cleared. Both snowfields had high sound absorptive characteristics. There was strong sound attenuation in the frequency range where contained main spectra of the human voice. On the other hands, High frequency sound component, as including instrument music, easily and noisily propagated above the snowfield. The numerical simulation on the sound propagation above snowfield was carried out using measured acoustic impedance of the surface. Another simulation basis of scale model experiments was also carried out by using jute and towel cloth as corresponded material to the snowfield. It could be also cleared that both simulation results matched well to the results of field measurements.