The reciprocating motion of an object or particle relative to its equilibrium position is called vibration. Vibration is divided into sinusoidal vibration, random vibration, compound vibration, scanning vibration, fixed frequency vibration. The main parameters describing vibration are: amplitude, velocity, vibration subdivision, and acceleration.

Tests on actual or model vibration systems in the field or in the laboratory. Vibration systems are mass-elastic systems that are excited by vibration sources, such as machines, structures or their components, living organisms, etc.