You're pretty spot on here -- up to approximately 1500Hz, the auditory brain can make use of so-called inter-aural time differences which allow estimation of a

You're pretty spot on here -- up to approximately 1500Hz, the auditory brain can make use of so-called inter-aural time differences which allow estimation of a given source's azimuth. After that, phase differences become ambiguous and the brain relies more heavily on inter-aural volume differences. http://en.wikipedia.org/wiki/Interaural_time_difference http://en.wikipedia.org/wiki/Interaural_time_difference