Nonlinear Effects in Liquid and in Fluid Saturated Friable Media under DC Field

The series of experiments on research of nonlinear properties amplification in liquid and fluid saturated rock under an electric field action have been carried out in the laboratory physical models. As a physical models there were used the one-dimensional liqiud and sand model saturated with water. Acoustic source of biharmonic signal was used. The parameters of diferental frequensy wave in acoustical frequency range of 250Hz-5kHz have been studied under influence of external direct electric current. The significant changes of diferental friquency wave's amplitudes were observed depending on DC action. At the same time there were no considerable changes of seismic parameters in the case of rock saturated with non-conductance liquid or in dry medium. A possible mechanism of these effects is discussed.