Noise is unpleasant or unwanted sound. Noise is a kind of pollution. We call it noise or sound pollution. Too much of noise can make people ill.
When substances such as air, water or the soil are spoiled or made dirty by people, pollution takes place.
Sound enters through the outer ear. Then passes Through ear canal. Then the eardrum vibrates. Next it passes the three tiny ear bones and the tube shaped like a snail shell. Then through nerve cells goes up to the Brain
Yes. All the parts of our ears are very delicate and easily damaged.
E.g. – An eardrum is as thin as tissue paper and easily broken. Very loud noises can damage our eardrums.
People who work in noisy places or use noisy machines have to wear ear defenders to protect their ears.
Ear defenders muffle the sound so that loud noise cannot reach the eardrums.