A Calculation of the Acoustic Shear Wave Attenuation in Sea Ice.

The attenuation of an acoustic disturbance propagating in a medium which is not perfectly elastic, homogeneous and isotropic can be considered to be the result of energy dissipation due to classical processes and scattering. The contribution of each of these mechanisms is dependent upon the frequenc...

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Bibliographic Details
Main Authors: Hanse,J. G., Bunney,R. E.
Other Authors: WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
Format: Text
Language:English
Published: 1974
Subjects:
Snow
Ice and Permafrost
Acoustics
*Sea ice
*Acoustic waves
*Attenuation
Ice reporting
Thickness
Shear properties
Wave equations
Computer programs
Most Project-2
Ice
permafrost
Sea ice
Online Access:http://www.dtic.mil/docs/citations/AD0786707
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0786707
Description
Summary:The attenuation of an acoustic disturbance propagating in a medium which is not perfectly elastic, homogeneous and isotropic can be considered to be the result of energy dissipation due to classical processes and scattering. The contribution of each of these mechanisms is dependent upon the frequency of the sound wave. In this report several mathematical models are discussed for a transverse wave moving in a visco-elastic material and a scattering theory is developed. The theory is applied to sea ice and attenuation as a function of frequency is predicted for this material. (Author)

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