A harmonic is a signal or wave whose frequency is an integral (whole-number) multiple of the frequency of some reference signal or wave. The term can also refer to the ratio of the frequency of such a signal or wave to the frequency of the reference signal or wave.
Harmonics are the high pitched tones that are produced when a string player lightly touches certain points on a string.
Harmonics are used to play notes higher notes. They have higher frequencies if compared with fundamental frequencies of the string. They are played by just touching the string rather pressing the string.
