摘要
Based on the Boit theory of acoustic wave propagation in fluid-saturated porous medium we have studied in this paper the acoustic reflection and transmission on multilayered porous media, in which the adequate boundary conditions across the interfaces are taken into account. Numerical calculations of the reflection and transmission coefficients at different incident angles and frequencies of the fast compressional wave incident on porous media with three or four layers are presented. The results indicate that the maximum or minimum reflection and transmission coefficients appear at certain ratios of the wavelength to the thickness. The acoustic incident angle and porous medium properties are shown to affect significantly these coefficients. As an example, the measured transmission coefficients in a water-saturated fused glass bead sample are in good agreement with theoretical prediction.
Based on the Boit theory of acoustic wave propagation in fluid-saturated porous medium we have studied in this paper the acoustic reflection and transmission on multilayered porous media, in which the adequate boundary conditions across the interfaces are taken into account. Numerical calculations of the reflection and transmission coefficients at different incident angles and frequencies of the fast compressional wave incident on porous media with three or four layers are presented. The results indicate that the maximum or minimum reflection and transmission coefficients appear at certain ratios of the wavelength to the thickness. The acoustic incident angle and porous medium properties are shown to affect significantly these coefficients. As an example, the measured transmission coefficients in a water-saturated fused glass bead sample are in good agreement with theoretical prediction.
