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Using a general mode for sound reflection from multilayered media,we present in this paper the expressions for sound reflection and transmissioncoefficients on void-containing interface layer in solid and derive the character-istic equation for symmetric and antisymmetric modes of the interface wavesalong the layer.The method for evaluating the effective elastic moduli ofvoid-containing solid is also introduced.The numerical calculation given in thispaper shows the influences of the void volume concentration and layer thick-ness on the sound reflection coefficients and interface wave velocity,providing atheoretical basis for inverse of the mechanical properties of void-containinglayer based on the ultrasonic measurement.
Using a general mode for sound reflection from multilayered media, we present in this paper the expressions for sound reflection and transmissioncoefficients on void-containing interface layer in solid and derive the character-istic equation for symmetric and antisymmetric modes of the interface wavesalong the layer. The method for evaluating the effective elastic moduli of void-containing solid is also introduced. The numerical calculation given in this paper shows the influences of the void volume concentration and layer thick-ness on the sound reflection coefficients and interface wave velocity, providing atheoretical basis for inverse of the mechanical properties of void-containing layer based on the ultrasonic measurement.