Resonance

Subject classification: this is a physics resource.

In physics, resonance is the tendency of a system to vibrate with increasing amplitudes at some frequencies of excitation. These are known as the system's resonant frequencies (or resonance frequencies) ^[1].

An example of useful effect of resonant frequency is a guitar string which makes a characteristic noise when it is touched. The noise depends on how thick or slack the string is.

In earthquake engineering, on contrary, any possibility of a resonance is detrimental for the building structure.

Wikimedia Commons has media related to Mechanical vibrations.

• Vibration control