How Sound Travels Through The Ear 
External Ear
3.Tympanic Membrane: Impulses from external ear move through the Tympanic Membrane (Ear Drum) to the Malleus.
2.External Acoustic Meatus: Ear Canal that carries sound to the Tympanic Membrane.
1.Auricle: Collects sound waves traveling through the air, directs them into the External Acoustic Meatus. 
Middle Ear
4.Malleus:Pushes sound through to the Incus. 
5.Incus: Pushes sound through to the Stapes. 
6.Stapes:Pushes Sound on through the Oval Window which is the start of the inner ear. 
Inner Ear
7.Oval Window:Vibrations enter the Perilymph at the Oval Window.
8.Scala Vestibuli:Vibrations travel along the Scala Vestibuli. 
9.Cochlear Duct: Vibrations enter the Endolymph of the Cochlear Duct.
10.Cochlear Duct:Vibrations enter the endolmph of the Basilar Membrane.
11.Basilar Membrane:Vibrations move through the Basilar Membrane.
13.Scala Tympani: Vibrations enter the perilymph of the Scala Tympani and their forces dissipate into the air.
12.Organ of Corti:The hair cells convert vibrations into nerve impulses that are transmitted by the cochlear portion of the eight cranial nerve to the brain.
14.Round Window:Vibrations exit through the round window. 