This paper presents a study of the reflection of sound pulse from porous material in the ease that the impulse sound source and receiver are located on a line perpendicular to the surface of material.
本文提出当脉冲声源和接收点在同一条垂直于材料表面的直线上时，声脉冲从多孔材料反射的研究。
This paper develops a theoretical formula for calculating interfacial noise of vibrating point from its vibratory quantity with pulse semisphere sound source as basic physical model.
本文以脉动半球声源为基本物理模型，推导了由振动量计算振动点的界面噪声的理论公式。
M sequence signal can be chosen as the receiving deterministic pulse signal when using acoustic vector to determine the direction of the sound source. It possesses favorable anti-multipath capability.
利用矢量水听器接收确知脉冲信号来确定声源方位时，脉冲信号形式可以考虑采用M序列调相信号，具有良好的抗多途效应。
M sequence signal can be chosen as the receiving deterministic pulse signal when using acoustic vector to determine the direction of the sound source. It possesses favorable anti-multipath capability.
利用矢量水听器接收确知脉冲信号来确定声源方位时，脉冲信号形式可以考虑采用M序列调相信号，具有良好的抗多途效应。
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