衰减
横截面(物理)
正弦波
物理
信号(编程语言)
反向散射(电子邮件)
反射(计算机编程)
体积热力学
激发态
散射
光学
计算物理学
声学
原子物理学
计算机科学
电信
电压
量子力学
程序设计语言
无线
作者
Rubens A. Sigelmann,John M. Reid
出处
期刊:Journal of the Acoustical Society of America
[Acoustical Society of America]
日期:1973-05-01
卷期号:53 (5): 1351-1355
被引量:192
摘要
This paper develops a practical approximation for the backscattering of periodic bursts of sine waves by a volume of randomly distributed scatterers. The approximation is applied to the measurement of a “volumetric backscattering cross section,” using a substitution method in which the rms value of the gated backscattered signal is compared with the rms value of a wave reflected from a target of known coefficient of reflection. It is shown that the signal backscattered from the ensemble depends on the attenuation of the wave in the volume and upon the burst and gate lengths. An equation to obtain the volumetric backscattering cross section from experimental data is derived.
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