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Give a Brief Account Of: Mechanism of Hearing - Biology

Give a brief account of:  Mechanism of hearing

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Solution

Mechanism of hearing

The pinna of the external region collects the sound waves and directs it towards ear drum or external auditory canal. These waves strike the tympanic membrane and vibrations are created. Then, these vibrations are transmitted to the oval window, fenestra ovalis, through three ear ossicles, named as malleus, incus, and stapes. These ear ossicles act as lever and transmit the sound waves to internal ear. These vibrations from fenestra ovalis are transmitted into cochlear fluid. This generates sound waves in the lymph. The formation of waves generates a ripple in the basilar membrane. This movement bends the sensory hair cells present on the organ of corti against tectorial membrane. As a result of this, sound waves are converted into nerve impulses. These impulses are then carried to auditory cortex of brain via auditory nerves. In cerebral cortex of brain, the impulses are analysed and sound is recognized.

 

Concept: Sensory Reception and Processing - The Ear - Mechanism of Hearing
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APPEARS IN

NCERT Class 11 Biology Textbook
Chapter 21 Neural Control and Coordination
Q 6.3 | Page 329
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