REFLECTION AND TRANSMISSION OF ACOUSTIC WAVE AT A POROUS SOLID/POROUS SOLID INTERFACE
QIAO WEN-XIAO WANG NING YAN CHI-PEI(The University of Petroleum, Dongying 257062, Shandong)
The calculating formulas of reflection and transmission for plane acoustic wave on an interface between porous solid/porous solid are studied in this paper. The dependance of reflection and transmission coefficients of various bulk waves on acoustic frequency, incident angle, porous solid parameters etc. are calculated for the case that the incident wave is the first kind of compressional wave. The numerical investigation is checked by equilization of energy flux crossing interface in normal direction. Our results show that the reflection and transmission coefficients of various bulk waves are sensitive to incident angle of acoustic wave, medium properties as well as the frequency near the Biot critical frequency. The first kind of compressional wave and the second kind of compressional wave are mainly existed in frame and fluid respectively. Also, if the porous solid is simulated by isotropic solid, the results will be much different.