Name: Study of Infrasound and Ultrasound in Waves
Uploaded: 2019-07-19
Duration: 5 min 55 s
Description: If you pay attention, you will be able to hear so many different sounds in your daily life. What about the sounds that the human ear is not capable of detect...

Question

With the help of a labelled diagram, explain the working of the human ear.

Accepted Answer

Human ear, organ of hearing and equilibrium that detects and analyses sound by transduction or the conversion of sound waves into electrochemical impulses and maintains the sense of balance.

Working of human ear:-

The sound waves are collected by the pinna of the outer ear. These sound waves pass through the auditory canal and fall on the eardrum. Sound waves consist of compressions and rarefactions. When the compression of sound waves strikes the eardrum the pressure on the outside of a drum increases and pushes the eardrum inwards and where the rarefactions of the sound wave fall on the eardrum the pressure of the outside of eardrum decreases and it moves outward. When the sound waves fall on the eardrum starts vibrating to and fro rapidly.

The vibrating eardrum causes as small bone hummer to vibrate from hummer, vibrations are passed on to the second bone anvil, and finally to the third bone stirrup. The vibrating stirrup strikes on the membrane of the oval window and passes its vibrations to the liquid in the cochlea. Due to this the liquid in the cochlea begins to vibrate. The vibrating liquids of cochlea setup electrical impulses in the nerve cells present in it. These electrical impulses are carried by the auditory nerve to the brain. The brain interprets these electrical impulses as sound, and we get the sensation of hearing.

With the help of a labelled diagram, explain the working of the human ear.

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