An experimental investigation of the propagation of sound over a curved, rough, rigid surface
An experimental investigation of the propagation of sound over a curved, rough, rigid surface
复制标题
声音在弯曲、粗糙、刚性表面上传播的实验研究
DOI：
--
复制
发表时间：
1997
期刊：
影响因子：
--
通讯作者：
Y. Berthelot
中科院分区：
文献类型：
--
作者：
J. P. Chambers;Y. Berthelot
我们进行了小规模的实验室实验来研究声音在弯曲、粗糙、刚性、凸面的传播，范围为 kR=275-550，ke=0.09-0.18，其中 k 是波数，R 是曲率半径，e 是陡坡密集散射体的特征粗糙度长度尺度。实验结果以 6、8 和 12 kHz 的频率呈现，接收器依次位于表面、沿着表面后面的视线以及沿着阴影区域的垂直轴。在低频（f=6 kHz，ke=0.09）下，由相干多重散射引起的边界波在表面附近形成，蔓延到深阴影区，并且与没有表面粗糙度的情况下测量的声压级相比，在深阴影区中测量的声压级增加了高达8 dB。在高频（f = 12 kHz，ke = 0.18）下，表面粗糙度会导致不相干散射，并使阴影区域表面的测量声压级降低约 10 dB，...
Small-scale laboratory experiments have been conducted to study the propagation of sound over a curved, rough, rigid, convex surface in the range kR=275–550, and ke=0.09–0.18, where k is the wave number, R the radius of curvature, and e the characteristic roughness length scale of steep-sloped, densely packed scatterers. Experimental results are presented at 6, 8, and 12 kHz, with the receiver successively on the surface, along the line of sight behind the surface, and along a vertical axis in the shadow zone. At low frequencies (f=6 kHz, ke=0.09), a boundary wave caused by coherent multiple scattering develops near the surface, creeps into the deep shadow zone, and increases the sound-pressure levels measured in the deep shadow zone by up to 8 dB as compared to the levels measured in the absence of surface roughness. At high frequencies (f=12 kHz, ke=0.18), surface roughness causes incoherent scattering and decreases the measured sound-pressure levels by about 10 dB on the surface, in the shadow zone, an...