ASA 129th Meeting - Washington, DC - 1995 May 30 .. Jun 06
2pPP49. Measurement of localization ability using virtual audio cues and
visual target acquisition.
William R. D
AL/CFBA, 2610 Seventh St., WPAFB, OH 45433-2901
Richard L. McKinley
AL/CFBA, WPAFB, OH 45433
David R. Perrott
California State Univ., Los Angeles, CA
Larry Hettinger
Logicon Technical Services, Inc., WPAFB, OH 45433
Visual target detection was used to demonstrate the ability of subjects to
localize with a virtual audio display. The testing facility consisted of audio
presented over headphones with and without localization cues and a projection
screen bearing the visual scene. In each trial the visual target appeared as
one pixel at a random location of the screen. The target grew in size until
found by the subject. The sound cue came on at threshold level and became
progressively louder until the target was found. The audio cue was pink noise
while the visual targets consisted of aircraft icons. Subject reaction time was
measured from target onset to target detection. As indicated by the preliminary
data, the localized audio condition faithfully provided the location of the
target resulting in reaction times significantly better than with the
nonlocalized audio cue.