The direct and inverse scattering problems of ultrasonic wave propagation in double-layered porous materials is studied. The inverse problem is solved using experimental transmitted waves at normal incidence. The double-layered porous media consist of two slabs of homogeneous isotropic porous materials with an elastic frame. The ultrasonic propagation in multilayered porous material is modelled using Biot's theory. The sensitivity of the Biot parameters with respect to the transmitted wave is studied showing the effect on each parameter on transmitted waveforms. The direct and inverse scattering problems are discussed for double-layered porous samples using experimental transmitted waves