According to the theoretical model of elastic media with multiple layers of different densities and velocities, this paper presents a so called add layer method to accurately calculate the transmission loss in strata.

Transmission matrix solution of seismic propagation equation in viscoelastic layered and porous media;

Simultaneous inversion of three parameters in layered elastic medium;

The physical parameter of stratified viscoelastic media has been inversed by the homotopy method with widely convergence from its dynamic response in time domain,which includes more information than the quasi-static movement or response in frequency domain.

Two dimensional fundamental solutions to layered elastic media;