Sound that impinges on the inner ear and the auditory nerve arrives as a fairly meaningless stimulus. At this point, it should be viewed as:
a. perception.
b. sensation.
c. an auditory stimulus item.
d. free of environmental noise.
I think it is either a or b. I know that sensation is the activation of the sense organs by any source of physical energy. In contrast, perception is the process by which we sort out, interpret, analyze, and integrate stimuli to which our senses are exposed.