The Human Ear: (Auditory mechanism of hearing): The Human Ear is mainly divided into three portions. One is outer Ear which collects sound waves from surroundings,
Second one is Middle Ear, which transmits amplified sound waves to the inner ear, and
Third one is Inner Ear, which converts amplified sound waves into electrical signals.
These electrical signals are passed through the auditory nerve to the brain and brain interprets them as sound.
The Human Ear explains the auditory mechanism of hearing, working of three portions (Outer ear, Middle ear, Inner ear) in human ear which converts sound waves into electrical signals and auditory nerve transmits electrical signals to brain and brain interprets them as sound.

ที่มา : http://www.youtube.com/channel/UCflmr7Tyyy38MaAENetim_g อัพโหลดโดย 7activestudio