Considering the viscous interaction between the kernel and the air inside the grain the paper shows the dynamic tortuosity function in grain . considering the thermal exchanges between the kernel and the air the paper shows the dynamic permeability function in grain 考虑准多孔介质声传播中存在空气与颗粒间的粘滞力和惯性力，推导出准多孔介质中孔隙动态曲折度函数表达式。
