How Hearing Works
The auditory system is extremely complex, and the journey that carries sound waves to your brain is intricate. First, the outer ear channels the sound waves around you towards the middle ear, and acts as a natural amplifier to help you hear and locate all the sounds around you.
Next, the sound waves vibrate against the ear drum, or middle ear, causing three little bones in the middle ear to vibrate. This vibration causes movement in the fluid-filled inner ear, called the cochlea. As this fluid moves, tiny hair cells in the inner ear also move. These cells translate this movement into electrical signals, and send those signals to the brain, where the auditory center in your brain translates these signals so that you can hear.