Paragraph on “How do we Hear?” complete paragraph for Class 9, Class 10, Class 11 and Class 12
How do we Hear?
Sound is caused by pressure waves that vibrate. These vibrations are funneled by the outer ear to the ear drum. The ear drum is extremely sensitive, and it, in turn, vibrates. The vibrations of the ear drum are then transmitted to the three bones of the middle ear : the hammer, which touches the inner surface of the drum, the anvil and the stirrup. These tiny boens are joined together and the stirrup touches the inner ear, or cochlea, so that it, in turn, receives the vibrations from the ear drum.
The cochlea contains fluid- filled tubes which are linked to the auditory, or hearing, nerve. The vibration cause tiny pressure changes in the fluid which act on the auditory nerve.
The auditory nerve sends messages to the brain which interprets them as sound.
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