title: Harmonic (disambiguation)
text: # 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
  