Modelling acoustic scattering, sound speed, and attenuation in gassy soft marine sediments
Modelling acoustic scattering, sound speed, and attenuation in gassy soft marine sediments
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 new model 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.
274-282
Mantouka, Agni
5cf325f2-3311-477a-b180-460e8724356e
Dogan, Hakan
a1e136a9-aab8-4942-a977-0ae3440758cc
White, Paul
2dd2477b-5aa9-42e2-9d19-0806d994eaba
Leighton, Timothy
3e5262ce-1d7d-42eb-b013-fcc5c286bbae
July 2016
Mantouka, Agni
5cf325f2-3311-477a-b180-460e8724356e
Dogan, Hakan
a1e136a9-aab8-4942-a977-0ae3440758cc
White, Paul
2dd2477b-5aa9-42e2-9d19-0806d994eaba
Leighton, Timothy
3e5262ce-1d7d-42eb-b013-fcc5c286bbae
Mantouka, Agni, Dogan, Hakan, White, Paul and Leighton, Timothy
(2016)
Modelling acoustic scattering, sound speed, and attenuation in gassy soft marine sediments.
Journal of the Acoustical Society of America, 140 (1), .
(doi:10.1121/1.4954753).
Abstract
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 new model 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.
Text
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- Accepted Manuscript
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Submitted date: 4 May 2015
Accepted/In Press date: 9 June 2016
e-pub ahead of print date: 14 July 2016
Published date: July 2016
Organisations:
Inst. Sound & Vibration Research
Identifiers
Local EPrints ID: 396674
URI: http://eprints.soton.ac.uk/id/eprint/396674
ISSN: 0001-4966
PURE UUID: c9eb8c5d-f14d-4890-9c17-e0f1501e984f
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Date deposited: 22 Jun 2016 15:51
Last modified: 15 Mar 2024 05:39
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Contributors
Author:
Agni Mantouka
Author:
Hakan Dogan
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