Question

WORKING OF A HUMAN EAR?

Explain.

Answer 1

Sound waves are collected by the pinna and then are directed through ear canal sound waves on striking the eardrum make it vibrate exactly the same way as the given sound emitting object.

The bones in thge middle ear start vibrating when eardrum vibrates. It helps in magnifying the vibrations. When the magnified vibrations reach the cochlea in the inner ear, the fluid in it starts vibrating.

These vibrationsare picked up by sensory receptors and are converted into electrical signals.

These electrical signals then travel to the brain which interprets sound.
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Answer 2

the outer ear Is called pinna it collects the sound from the surrounding. the collected sound passes through the auditory canal. at the end of the canal there is a eardrum. the eardrum moves outwards when a rarefaction reaches. in this way the eardrum vibrates. the vibrations are amplified several times by three bones hammer anvil and stirrup in the middle ear. the middle ear transmits the amplified pressure variations received from the sound waves to the inner ear. in the inner ear the pressure variations are turned into electrical signals. these electrical signals are sent to the brain via auditory nerve. the brain finally interprets them as sound

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