Sound scattering by random fractal inhomogeneities in the ocean

被引：8
|
作者：
Kopyl, EA [1 ]
Lysanov, YP [1 ]
Lyamshev, LM [1 ]
机构：
[1] Russian Acad Sci, NN Andreev Acoust Inst, Moscow 117036, Russia
来源：
ACOUSTICAL PHYSICS | 2002年 / 48卷 / 04期
基金：
俄罗斯基础研究基金会;
关键词：
Anisotropy; Refraction; Fractal Dimension; Energy Spectrum; Acoustics;
D O I：
10.1134/1.1494025
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
Sound scattering by random volume inhomogeneities (fluctuations of the refraction index in a medium) with an arbitrary anisotropy is considered using the small perturbation method (Born's approximation). Surfaces (boundaries) of the inhomogeneities are deemed to be fractal ones: the energy spectra of the refraction index fluctuations follow the power law with a nonintegral exponent. Formulas are obtained for the volume scattering coefficient. Frequency and angular dependences of the scattering coefficient and their relations to the fractal dimension of inhomogeneities with different kinds of anisotropy and different sizes (on the sound wavelength scale) are presented. The fractal dimension of the inhomogeneities is estimated. (C) 2002 MAN "Nauka/Interperiodica".
引用
收藏
页码：453 / 457
页数：5
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