Discuss briefly the structure and working of the human ear?
Ear collects sound waves and channels them into the ear canal (external auditory meatus), where the sound is amplified. Sound waves cause the eardrum to vibrate. Structure of human ear: Outer ear is called pinna followed by an auditory canal in which ends in a tympanic membrane. The tympanic membrane is then connected to three bones, hammer, anvil and stirrup. After that there is a cochlea connected to an auditory nerve. Working of the human ear: The auricle or the pinna collects the sound and the collected sound passes through and reaches the auditory nerve. After which it forces the eardrum (tympanic membrane) to vibrate. The vibrations are then amplified by 3 bones and the pressure variations reach the inner ear after which the cochlea converts them to electrical signals. Auditory nerve carries the electrical signals to the brain and the brain interprets them as sound.
