There are 5 parts in the ear that work together to detect and transmit sound to the brain where the sound is interpreted:
Outer Ear -> Middle Ear -> Inner Ear -> Acoustic Nerve -> Brain
1. Outer Ear
Sounds waves, collected by the Pinna, are transmitted along the Ear Canal to the Ear Drum.
2. Middle Ear
Sound waves hit the Eardrum and set the Middle Ear Bones (Ossicles) into vibration. Middle Ear Bones (Ossicles) then amplify the vibration and transmit the vibration from the Ear Drum to the Oval Window in the Inner Ear.
3. Inner Ear
The vibration triggers movement of the fluid in the Cochlea and sets the hair cells into vibration. When Hair Cells vibrate, they translate the incoming acoustic signals into nerve impulses, and send to the Acoustic Nerve.
4. Acoustic Nerve
Nerve impulses are transmitted along the Acoustic Nerve to the Brain.
5. Brain (Central Auditory System)
Central Auditory System processes and translates the impulse signals into auditory information, so we can “hear”.