#vibration__oscillation  (physics) a regular variation in value about a mean
  supertype:  #undulation__wave  (physics) a progressive disturbance propagated without displacement of the medium itself
  subtype:  #ripple  (electronics) an oscillation of small amplitude imposed on top of a steady value
  subtype:  #transient  (physics) a short-lived oscillation in a system caused by a sudden change of voltage or current or load
  subtype:  #beat.vibration  a single pulsation of an oscillation produced by adding two waves of different frequencies; has a frequency equal to the difference between the two oscillations
  subtype:  #resonance.vibration  a vibration of large amplitude produced by a relatively small vibration near the same frequency of vibration as the natural frequency of the resonating system
  subtype:  #sympathetic_vibration__sympatheticvibration  (physics) vibration produced by resonance

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