Final answer:
The time difference in sound detection by the two ears is computed at the superior olivary complex, which is central to sound localization through processing interaural time and intensity differences. The correct option is B).
Step-by-step explanation:
The computation for detecting the location of sound by comparing the time difference between the two ears occurs at the superior olivary complex.
Sound localization involves processing in the medullary nuclei of the auditory system, particularly in the superior olivary complex, which allows the brain to calculate interaural time difference and the interaural intensity difference.
This difference in the timing and intensity of sound reception in each ear enables the determination of where the sound is coming from.
The tectum, which includes the inferior and superior colliculi, is involved in different aspects of auditory processing. The inferior colliculus plays a part in the auditory brain stem pathway and projects to the thalamus, and then to the auditory cortex for conscious perception of sound.
However, the superior colliculus combines information regarding visual space, auditory space, and somatosensory space; it is involved in orienting the eyes and head towards stimuli but not in the specific task of comparing auditory time differences which are handled by the superior olivary complex. Option B) is the correct one.