When you call your friend by name,do you produce a wave pulse of sound or a periodic wave?
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When we call our friend by name we produced a periodic wave because a continuous disturbance of air medium takes place by regular vibration
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In this case, the particles of the medium move parallel to the direction that the pulse moves.
This type of wave is a longitudinal wave. Longitudinal waves are always characterized by particle motion being parallel to wave motion.
A sound wave traveling through air is a classic example of a longitudinal wave.
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