Imagine That You Are Trying to Create a Computer Program

Imagine that you are trying to create a computer program to localize sound based on input to two microphones, in a manner similar to how humans use the information reaching each of their ears. What would you need to calculate?

A) the difference in timing of sounds reaching each ear
B) the difference in intensity of sounds reaching each ear
C) the differences in both timing, and intensity, of sounds reaching each ear
D) the ear registering the absolute loudest sound
E) the ear which is stimulated by the sound wave first