Structure of the ear, focusing on the role that each component plays in transmitting the vibrations

Describe the structure of the ear, focusing on the role that each component plays in transmitting the vibrations that enter the outer ear to the auditory receptors in the inner ear. Then, discuss the basic difference between determining the location of a sound source in the brain and determining the location of the visual object in the brain. Lastly, discuss the somewhat surprising outcome of research on hearing loss in urban versus rural environments, and the physiological explanation behind it. Support your belief and use specific examples.