Directivity and sound diffraction of the pinna of the Megaderma spasma are studied to predict the the role of these outer ear extensions in the biosonar system.
本文研究的重点就是通过模拟计算来预测这种明显的外耳扩展部分对波束形成的影响。
Because of wavelength of sound at low frequencies being close to the dimensions of small enclosures, scattering and diffraction in the course of sound radiation can not be ignored.
在小尺度封闭空间内，声波低频成分的波长与空间尺寸相当，声音在传播过程中所发生的散射、衍射等波动现象不容忽视。
The attenuation amount of diffraction of this sound barrie is calculated according to the acoustics principle, the feasible remedies are put forward.
并根据声学原理计算了该声屏障绕射衰减量，提出了切实可行的补救措施。
Diffraction - not only will a wave of sound reflect or absorb but it can go over the obstacle.
衍射-声音虽然会被反射已经吸收，但是他能绕过阻挡物。
The impact of obstacles has been considered that it comprises reflection, diffraction and reflection of diffraction of sound.
障碍物影响考虑了反射，衍射和衍射的反射。
In this model, the noise field in sound shadow region is deduced by applying Huygens-Fresnel principle. It provides a new ideal for deducing the diffraction sound of complicated…
模型中对声影区的声场分布采用惠更斯-菲涅耳原理进行推导计算，给出的理论计算公式可为推导计算其它复杂声源的衍射声提供借鉴。
The NLOS sound signal usually arrives at acoustic array by diffraction, and the diffracted transmission path is a geodesic according to the extensive Famat's principle.
非视距声信号通常经过绕射到达基阵，根据广义费马原理，传播路径为一条短程线。
PAN fibers with different drawing ratio and different preoxidation degree were investigated by means of sound velocimeter and X-ray diffraction meter.
采用声速仪及X射线衍射仪对不同牵伸倍数和不同预氧化程度的PAN纤维进行取向度和预氧化程度的测试，并将其结果进行对比。
PAN fibers with different drawing ratio and different preoxidation degree were investigated by means of sound velocimeter and X-ray diffraction meter.
采用声速仪及X射线衍射仪对不同牵伸倍数和不同预氧化程度的PAN纤维进行取向度和预氧化程度的测试，并将其结果进行对比。
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