SOUND

 

                                   SOUND

Sound :--

               Sound is a form of energy which produces a sensation of hearing in our ears.  Sound waves that we can hear or sound is made up of the vibrations.  The to and fro motion of the body is called as vibration.

Sound is a vibration that propagates as and acoustic wave, through a transmission medium such as solid, liquid or gas.

Sound is defined as Oscillation in pressure, stress, particle displacement, particle velocity, etc., propagated in a medium with the internal forces (such as elastic or viscous) or the superposition of such propagated oscillation.

The sound is the form of energy that helps in the listening of human being. And also sound is a form of the kinetic mechanical energy which moves in a form of a wave.

Hertz (Hz) and Decibel (DB) are used measurement units to measure the sound.

 

 

Production of the sound?

The object is vibrating and produces the sound. Vibration means a kind of rapid to and fro motion of a object. Sound is produced by the plucking, scratching, rubbing, blowing or shaking different objects. The sound of the human being voice is produced by the vibrations in the vocal cords.

To understand the production of the sound, let us do some activities.

Let us take a tuning fork and when we strike the prong of tuning fork on the rubber pad, it starts vibrating. And emits the sound. Also our fingers also feels some vibrations.  These vibrations cause the nearby molecules to vibrate. And transmitting the sound further through the medium (air, water or solid). The human ear detects sound wave when vibrating the air particles vibrate small parts within the ear.   

If a metal is struck by the hammer, it produces a sound or if a metal falls on the surface of the ground it produces a vibrations and this vibration generates waves in the medium which oscillates the membrane of our ear, allowing to perceive sound but if  we touch this metal then sound will get reduced.

 Sound is created by blowing through the flute, plucking a musical instrument’s string or vibrating the membrane of a drum.