In vibration, the derivative of displacement against time is velocity, and the derivative of velocity against time is acceleration. Therefore, in simple harmonic vibration, acceleration amplitude = vibration frequency * velocity amplitude = vibration frequency square * displacement amplitude.

The vibration frequency f is the number of vibration cycles of an object per second, in international units of Hertz. Frequency is a symbol of vibration characteristics and an important basis for analyzing vibration causes.

Vibration of the object in the unit time of the number of vibration, commonly used symbol F, frequency unit for times/second, also known as Hertz. Vibration frequency represents the speed of the vibration of the object. In the pathogenic effect of vibration, frequency plays an important role.