Compressional Wave Speed and Absorption Measurements in a Saturated Kaolinite-Water Artificial Sediment.
NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF
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The absorption coefficient for compressional waves in a water-saturated, kaolinite clay was measured in the frequency range 100 to 150 kHz using a pulse technique with spherically diverging waves. The measurement also permitted determination of the sound speed, Vp. For one condition of the clay with a 77 porosity, the sound speed was 1422 msec. The absorption coefficient, a, was found to be frequency dependent, satisfying the empirical relationship a 0.033 f dBm, f being the frequency in kHz. No dispersion of wave speed with frequency was observed. These results were used together with the results of dynamic shear rigidity modulus measurements made with a torsional wave viscoelastometer to calculate the complex Lame constants of a viscoelastic model. Author
- Physical and Dynamic Oceanography
- Acoustic Detection and Detectors