Answer Posted / manu
Vibration refers to mechanical oscillations about an
equilibrium point. The oscillations may be periodic such as
the motion of a pendulum or random such as the movement of a
tire on a gravel road.
Vibration is occasionally "desirable". For example the
motion of a tuning fork, the reed in a woodwind instrument
or harmonica, or the cone of a loudspeaker is desirable
vibration, necessary for the correct functioning of the
various devices.
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