Dilatational waves in an elastic solid containing lined, gas-filled spherical cavities

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Abstract
The real and imaginary wavenumber components describing dilatational wave propagation in a porous medium are computed. The acoustically small cavities are spherical in shape and characterized by a statistical size distribution. They are gas‐filled and lined with an elastic shell. It is shown that marked dispersion and resonance‐enhancedabsorption requires that the Poisson’s ratio of the solid matrix lie between 1/3 and 1/2.

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