Sound speed in water-saturated glass beads as a function of frequency and porosity

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Authors
Argo IV, Theodore F.
Guild, Matthew D.
Wilson, Preston S.
Schröter, Matthias
Radin, Charles
Swinney, Harry L.
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Abstract
Description
Sound propagation in water-saturated granular sediments is known to depend on the sediment porosity, but few data in the literature address both the frequency and porosity dependency. To begin to address this deficiency, a fluidized bed technique was used to control the porosity of an artificial sediment composed of glass spheres of 265 {\mu}m diameter. Time-of-flight measurements and the Fourier phase technique were utilized to determine the sound speed for frequencies from 300 to 800 kHz and porosities from 0.37 to 0.43. A Biot-based model qualitatively describes the porosity dependence.
Comment: removed discussion of attenuation
Keywords
Condensed Matter - Soft Condensed Matter, Condensed Matter - Materials Science
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