Modelling acoustic scattering, sound speed, and attenuation in gassy soft marine sediments

被引：26

作者：

Mantouka, A. ^{[1
]}

Dogan, H. ^{[1
]}

White, P. R. ^{[1
]}

Leighton, T. G. ^{[1
]}

机构：

[1] Univ Southampton, Fac Engn & Environm, Inst Sound & Vibrat Res, Southampton SO17 1BJ, Hants, England

来源：

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA | 2016年 / 140卷 / 01期

基金：

英国自然环境研究理事会; 英国工程与自然科学研究理事会;

关键词：

COMBINATION FREQUENCY TECHNIQUE; IN-SITU; WAVE ATTENUATION; BUBBLE POPULATIONS; BEARING SEDIMENTS; METHANE BUBBLES; MUDDY SEDIMENTS; CROSS-SECTIONS; SAND SEDIMENTS; ELASTIC WAVES;

D O I：

10.1121/1.4954753

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

A model for nonlinear gas bubble pulsation in marine sediments is presented. This model is then linearized to determine the resonance frequency and the damping terms for linear radial oscillations. The linear model is then used to predict the effects that such bubble pulsations will have on the sound speed and attenuation of acoustic waves propagating in gassy marine sediment. The results are compared for monodisperse populations against the predictions of a model of Anderson and Hampton and, furthermore, the additional abilities of the model introduced in this paper are discussed. These features include the removal of the sign ambiguities in the expressions, the straightforward implementation for acoustic propagation through polydisperse bubble populations, the capability to estimate bubble size distributions through a full acoustic inversion, and the capability to predict nonlinear effects. (C) 2016 Acoustical Society of America.

引用

页码：274 / 282

页数：9

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