Based on the experiments this paper describes how the vibration energy is introduced into the vibrated bed(VB)and vibrated fluidized bed(VFB).For VB the vibration energy is in-troduced by collision between the vibrating plate and the particle bed

and for VFB by wave continuous propagation in the suspended particle bed.The wave characteristics are affected by the bed properties.Behaviors of bubbles in the bed can be studied by analyzing the wave frequency spectrum.