S: (n) ripple ((electronics) an oscillation of small amplitude imposed on top of a steady value)
S: (n) transient ((physics) a short-lived oscillation in a system caused by a sudden change of voltage or current or load)
S: (n) beat (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)
S: (n) resonance (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)