Sound is Produced by a Vibrating Body

A sound is a form of energy like heat energy, light energy, potential energy, and kinetic energy. It causes a sensation of hearing in our ears. Sound helps us communicate with each other.

Production of Sound:

(i) Sound is produced due to the vibration of the object.

(ii) The motion of materials or objects causes vibration.

(iii) Vibration is a kind of rapid to and fro motion of an object a central position. It is also referred to as oscillation.

Examples:

(a) A stretched rubber band, when plucked, vibrates and produces sound.

(b) In the music room of your school, you hear the sounds made by musical instruments like flute, tabla, harmonium, guitar, etc. because of vibration.

(c) When a spoon is beaten on the plate, it starts vibrating and produces sound.

Sound Produced by Humans

(i) In humans, the sound is produced because of the vibration of his voice box or larynx.

(ii) It is situated at the upper end of the windpipe. There are two stretched membranes called vocal cords attached in larynx with a narrow slit between them for passes air.

(iii) Muscles attached to the vocal cords can make the cords tight or loose. When the vocal cords are tight and thin, produce different type or quality of voice.

Structrure of larynx or vioce box
Larynx is the important organ in human body to produce sound.

Larynx has two muscular ligaments called vocal cords. They are stretched across voice box; it leads to a narrow slit between them, to allow passage of air, to produce sounds.