A group of 5 subjects who showed consistently biased sound source localization in the mid-sagittal plane with real sound sources in anechoic conditions is presented. Three of these subjects were also tested with virtual sound sources synthesized with their own individual head-related transfer functions. Localization under both conditions showed similar trends, even though they could not be considered as equivalent. This suggests that binaural technology was close to emulating the aural experience that the subjects had with real sound sources. These cases are presented to discuss different issues inherent to binaural synthesis, like the way in which the technology is validated and the assumptions that serve as a basis for the technology.
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