Free molecular sound propagation

被引：29

作者：

Sharipov, F ^{[1
]}

Marques, W ^{[1
]}

Kremer, GM ^{[1
]}

机构：

[1] Univ Fed Parana, Dept Fis, BR-81531990 Curitiba, Parana, Brazil

来源：

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA | 2002年 / 112卷 / 02期

关键词：

D O I：

10.1121/1.1490360

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

The sound propagation through a gas in the free-molecular regime is studied on the basis of the linearized collisionless Boltzmann equation. The two principal quantities that characterize the sound propagation, namely the phase and amplitude of the perturbation, are determined by taking into account the influence of the receptor. It is shown that at a small distance between the source and the receptor the presence of the last changes qualitatively the sound characteristics. Two phase velocities are introduced: a differential and an integral, which are different in the free molecular regime., (C) 2002 Acoustical Society of America.

引用

页码：395 / 401

页数：7

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