* * * Vibration is a technical term with very high frequency in physics, which refers to the situation that the vibration amplitude of a physical system at a specific frequency is greater than other frequencies; These specific frequencies are called * * * vibration frequencies. At the vibration frequency of * * *, a small periodic vibration can produce great vibration because the system stores kinetic energy. When the resistance is small, the vibration frequency of * * * is approximately equal to the natural frequency or natural frequency of the system, that is, the frequency of free oscillation. There are many * * * vibration phenomena in nature, such as * * * vibration of musical instruments, * * * vibration of inter-satellite orbits of some woody planets in the solar system, * * * vibration of basement membrane in animal ears and * * * vibration of circuits. Humans also use or try to avoid vibration in their technology.