Sound

  How do we "hear" sound 

Sound waves are collected by the outer ear and channeled along the ear canal to the eardrum. The impact of sound hitting the eardrum creates vibrations that cause three bones in the middle ear — the malleus, incus, and stapes (hammer, anvil and stirrup) — to move. The smallest, the stapes, fits into the oval window between the middle and inner ear.

<- This is a diagram of Inner Ear.