Your ear is a complex organ that transforms sound waves and vibrations in the air into information that can be interpretted by your brain. It can perceive sounds that are barely audible and tolerate sounds that are very loud, it can differentiate subtle pitches, loudness, distance, and detect the direction of its source, truly amazing!
Sounds waves enter the ear canal and travel down along it to the eardrum. These sounds waves vibrate the eardrum and the little bones or ossicles that are in the Middle Ear. These bridge the gap between the drum and transmit the vibrations to the cochlea in the Inner ear.
In the cochlea the vibrations are translated into electrical signals which are passed on to the brain along the acoustic, or auditory, nerve.