SENSORIMOTOR INTEGRATION OF VESTIBULAR, PROPRIOCEPTIVE, AND VISUAL INFORMATION ABOUT HEAD MOTION IN THE INTERPRETATION OF DYNAMIC AUDITORY CUES FOR FRONT/BACK SOUND LOCALIZATION

摘要

Accurate perception of the location of a sound source is greatly facilitated by listener head rotation, which generates dynamic interaural time- and level-difference cues that differ between front- and rear-hemisphere sources. Those cues, however, specify front/back location only when coupled with information about the head motion that produced them. Potential sources of head-motion information for the auditory system are the vestibular, proprioceptive, and visual systems. To investigate the influence of these extra-auditory modalities on the interpretation of dynamic acoustic cues, we have examined dynamic localization performance using an oscillating chair apparatus that permits dissociation of headon- body and head-in-space motion in combination with a pair of left/right-reversing prism glasses that provide incongruent visual motion information.