Identification of Acoustic Factors for Perception of Crossability Common to Blind and Sighted Pedestrians
This paper describes which auditory information affects the accuracy of “perception of crossability” for blind people. We have created a “virtual 3D acoustic environment” in which subjects feel a car passing in front of them to help them cross a road safely. The system is theoretically based on acoustic “time-to-contact” information, which is the most important concept in Ecological Psychology. Experimental results suggest that blind people tend to estimate the acoustic “time-to-contact” significantly longer than did sighted people. However, there are no significant differences between their sensitivities toward the speed of a moving sound source and the gain level of indirect sounds.
KeywordsSound Source Blind Subject Blind People Acoustic Environment Sighted Subject
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