The Perception of Location Using Synthetic Auditory Localization Clues: Accuracy and the Effects of Stimulus Bandwidth
Lee, Mark D.
Burgess, David A.
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The present experiment was designed to examine the accuracy with which people can localize sounds generated by three-dimensional or 3-D audio devices. Sixty subjects listened to two second pulse trains of white noise, using bandwidths of either 10 kHz, 12 kHz, or 16 kHz. A forced choice paradigm was used in which subject indicated that sound came from one of six azimuth locations (30, 90, 150, 210, 270, or 330 degrees) and one of three elevation locations (- 48, zero or level, and 48 degrees). Stimuli could also come from directly overhead. In all, nineteen possible locations were used (six azimuth by three elevation, plus straight up). Results indicated that with current technology and theoretical knowledge about auditory localization, performance is quite poor. Results are discussed in terms of the application of 3-D audio technology to aircraft cockpits.