Body positional effect on auditory spatial recognition by three-D acoustic stimulator

In the present study, we developed a three-D acoustic stimulator to investigate the auditory directional discrimination performance of human subjects. In this stimulator, the body position of the subject can be adjusted to an arbitrary angle by rotating the frame to which speakers are attached. Using this stimulator, we analyzed the body positional effect on auditory spatial recognition. The results showed that the directional discrimination performance of the subjects improved as the experimental session progressed. The correct discrimination rate of the task ultimately exceeded 90 percent in all body positional conditions.