Transport parameters and sound propagation in an air-saturated sand

Measurements at ultrasonic frequencies of the transmission coefficient and the sound speed in layers of quarry sand saturated by air and helium are pe rformed at different pressures. The measurement of surface impedance at aud ible frequencies is also performed for air-saturated layers. Evaluation of transport parameters can be obtained from these measurements. Close sets of parameters can be obtained at high and low frequencies with the model by P ride [Phys. Rev. B 47, 4964 (1993)]. (C) 1999 American Institute of Physics . [S0021-8979(99)01322-5].