| 声脉冲在多孔性媒质界面上的反射 |
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| 引用本文： | 陈通, 郑敏华, 蔡秀兰. 声脉冲在多孔性媒质界面上的反射[J]. 声学学报, 1984, 9(6): 359-371. DOI: 10.15949/j.cnki.0371-0025.1984.06.003 |
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| 作者姓名： | 陈通 郑敏华 蔡秀兰 |
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| 作者单位： | 中国科学院声学研究所(陈通，郑敏华)，中国科学院声学研究所(蔡秀兰) |
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| 摘 要： | 本文在理论上分析球面脉冲声波在空气和理想的多孔性媒质界面上的反射问题。在声源为脉冲点源的情形下,给出反射脉冲声波的一般表示式。对以下三种情况做了较详细的分析:（1）声源和接收点在垂直于界面的同一直线上,半无限厚多孔性媒质;（2）声源和接收点在垂直于界面的同一直线上,多孔性媒质层;（3）掠射,半无限厚多孔性媒质。脉冲声波在媒质层上的反射是以声脉冲在媒质层内多次反射和透射来处理的。文中还给出实验结果和理论计算的比较。
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| 收稿时间： | 1983-03-14 |
REFLECTION OF SOUND PULSE BY THE PLANE INTERFACE BETWEEN AIR AND A POROUS MEDIUM |
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| CHEN Tong, ZHENG Min-hua, CAI Xiu-lan. REFLECTION OF SOUND PULSE BY THE PLANE INTERFACE BETWEEN AIR AND A POROUS MEDIUM[J]. ACTA ACUSTICA, 1984, 9(6): 359-371. DOI: 10.15949/j.cnki.0371-0025.1984.06.003 |
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| Authors: | CHEN Tong ZHENG Min-hua CAI Xiu-lan |
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| Abstract: | This paper presents a theoretical analysis of the reflection of a sound pulse by the plane interface between the air and an idealized porous medium. A general expression for a pulsed point source has been derived. The detialed analysis is presented for three special cases: (1) source and receiver located on a line perpendicular to the interface, semi-infinite porous medium; (2) source and receiver located on a line perpendicular to the interface, porous me-dium layer; (3) grazing incidence, semi-infinite porous medium. In the second case, the problem is solved by considering the different reflections in the layer of porous medium. Experimental results are compared with the theoretical calculations for a kind of porous material. |
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