Draw a labelled diagram of the auditory parts of the human ear and explain how the human ear works.

(N/A) The human ear consists of three main parts: $(i)$ outer ear,$(ii)$ middle ear,and $(iii)$ inner ear.
$1$. Outer Ear: The outer ear,called the pinna,collects sound waves from the surroundings. These sound waves pass through the auditory canal to the eardrum (tympanic membrane).
$2$. Middle Ear: The eardrum vibrates when sound waves strike it. These vibrations are amplified by three small bones (hammer,anvil,and stirrup) in the middle ear.
$3$. Inner Ear: The amplified pressure waves are transmitted to the inner ear. In the cochlea,these pressure variations are converted into electrical signals by hair cells. These signals are sent to the brain via the auditory nerve,where they are interpreted as sound.