Sound

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. 

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