1996 Volume 20 Issue 46 Pages 51-56
"Obstacle sense"is an ability to detect existence of object by sound field variation, and is one of the circumstance recognition methods of the blind. In this report, the psychological factors of obstacle sense in the sound field in which the plural circumstance noises come from the arbitrary directions were investigated. The movement of the sound image, maybe by the precedence effect, was observed in the case that the wall existed in the side direction of head. The variation of timbre, maybe by the coloration, was observed in the case that the wall existed in the front. The conclusion is that the psychological factors of obstacle sense with respect to the front and side directions were different.
