Sound
The
distance traveled by a wave in one second is called wave velocity. It depends
upon the nature of the medium through which it passes.
The speed of sound depends primarily on the nature and the
temperature of the transmitting medium.
Sound
travels faster in solids than in air. The speed of sound in solids is much more
than the speed of sound in liquids or gases.
The
distance between two consecutive compressions or two consecutive rarefactions
is called the wavelength.
Frequency is defined
as the number of oscillations per second.
The
time taken by the wave for one complete oscillation of the density or pressure
of the medium is called the time period, T.
How
the brain interprets the frequency of an emitted sound is called the pitch of
sound.
Loudness is the
degree of sensation of sound produced.
Sound
properties such as pitch, loudness and quality are determined by the
corresponding wave properties.
Sound
gets reflected and follows the same law as the reflection of light.
The
persistence of sound due to repeated reflection and its gradual fading away is
called reverberation of sound.
Echo
is a repetition of sound due to the reflection of original sound by a large and
hard obstacle.
The
audible range of hearing for average human beings is in the frequency range of
20 Hz – 20 kHz.
The
amount of sound energy passing each second through unit area is called the
intensity of sound.
