Keyword:
Resonance

Resonance (from the Latin resonare, "to echo") is, in physics and engineering, the amplified oscillation of an oscillatory system when it is subjected to a time-varying influence. The system can oscillate many times more strongly than when subjected to a constant excitation at its maximum strength. In the case of periodic excitation, the excitation frequency or an integer multiple thereof must be close to a resonance frequency of the system. The phenomenon can occur in all oscillating physical and technical systems and is also common in everyday life. Resonances are often exploited in technology to filter out or amplify a specific frequency. However, where amplification is not desired, unwanted resonances must be avoided.