Harmonic (disambiguation)

Harmonic usually refers to the frequency components of a time-varying signal, such as a musical note.

Mathematics, science and engineering

 * Harmonic (mathematics), a number of concepts in mathematics
 * Harmonic analysis, representing signals by superposition of basic waves
 * Harmonic oscillator, a concept in classical mechanics
 * Simple harmonic motion, a concept in classical mechanics
 * Harmonic distortion, a measurement of signal distortion
 * Harmonics (electrical power)
 * Harmonic series (mathematics), a divergent infinite series
 * Harmonic tremor, a rhythmic earthquake which may indicate volcanic activity

Music

 * String harmonic, a string instrument playing technique
 * Artificial harmonic, a string instrument playing technique
 * Enharmonic, a "spelling" issue in music
 * Harmonic series (music), the series of overtones (or partials) present in a musical note, or the vibrational modes of a string or an air column
 * Scale of harmonics, a musical scale based on harmonic nodes of a string
 * The Harmonics, a rock a cappella group from Stanford University
 * Harmony, the musical use of simultaneous pitches, or chords
 * Inharmonicity, the degree of overtones' departure from integral multiples of the fundamental frequency
 * Overtone, any resonant frequency higher than the fundamental frequency

Other uses

 * Harmonic (color), a relationship between three colors
 * Harmonic Convergence, a New Age astrological term
 * "Harmonics", the twelfth movement of Mike Oldfield's Tubular Bells 2003 album
 * Harmonic Inc., a video infrastructure product company, headquartered in San Jose, California