In humans, there are several important non-acoustical
factors contributing to sound localization decisions:
head movements, vision (ventriloquism), and contextual
or cognitive cues (Wightman and Kistler, 1993). Thus,
sound source localization is a complex function resulting
from the interaction of several auditory capabilities,
several senses, and other estimates of the plausibility of
sound source locations. We suggest, then, that the basic
function of sound localization is to contribute to the
listener's perception of the structure of the auditory
scene.