Sound
Sound is a wave
motion, produced by a vibrating source.
A medium is
necessary for the propagation of sound waves.
Sound is a longitudinal wave
in which the particles of medium move along the direction of motion of wave.
The part or region of a
longitudinal wave in which the density of the particles of the medium is higher
than the normal density is known as compression.
The part or region of a
longitudinal wave in which the density of the particles of the medium is lesser
than the normal density is called a rarefaction.
The point of maximum positive
displacement on a transverse wave is known as crest.
The point of maximum negative
displacement on a transverse wave is known as through.
A wave or short duration
which is confined to a small portion of a medium at any given time is known as
a pulse.
The maximum displacement of
particles of the medium from their mean positions during the propagation of a
wave is known as amplitude of the wave.
