Uri is walking home alone on a dark night. He hears a stick breaking and immediately turns to his right to see what made the noise. What cue could Uri have used to tell which direction the sound came from?
A) the location along the basilar membrane stimulated by the sound
B) the slight time difference between when the sound reached each ear
C) the overall loudness of the sound
D) the frequency of the sound
Answer: B
Rationale: To locate the direction a sound is coming from, we depend in part on the fact that we have two ears. A sound arriving from the right reaches the right ear a fraction of a second sooner than it reaches the left ear, and vice versa.
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