Shaker also known as vibration exciter or vibration generator. It is a use of electric, electro-hydraulic, piezoelectric or other means to obtain mechanical vibration device. The principle is that the excitation signal is input into a coil placed in a magnetic field to drive the stage associated with the coil. Electric vibration table is mainly used for vibration measurement above 10Hz, the maximum excitation of 200N pressure. In the frequency range below 20Hz, often using electro-hydraulic vibrating table, then vibrate the nature of the signal by the electric servo system control. Hydraulic drive system can give greater displacement and impact. Vibration table can be used for accelerometer calibration, can also be used for electro-acoustic device vibration performance test and its vibration test. For different test objects and technical indicators, should pay attention to the selection of different structures and excitation range of vibration table.