A **harmonic** of a wave is a component frequency of the signal that is an integer multiple of the fundamental frequency, i.e. if the fundamental frequency is *f*, the harmonics have frequencies 2*f*, 3*f*, 4*f*, . . . etc. The harmonics have the property that they are all periodic at the fundamental frequency, therefore the sum of harmonics is also periodic at that frequency. Harmonic frequencies are equally spaced by the width of the fundamental frequency and can be found by repeatedly adding that frequency. For example, if the fundamental frequency is 25 Hz, the frequencies of the harmonics are: 50 Hz, 75 Hz, 100 Hz etc.

Read more about Harmonic: Characteristics, Harmonics and Overtones, Harmonics On Stringed Instruments, Other Information

### Famous quotes containing the word harmonic:

“For decades child development experts have erroneously directed parents to sing with one voice, a unison chorus of values, politics, disciplinary and loving styles. But duets have greater *harmonic* possibilities and are more interesting to listen to, so long as cacophony or dissonance remains at acceptable levels.”

—Kyle D. Pruett (20th century)