Abstract
We built an acoustical telepresence robot, Telehead, which has a user-like dummy head and is synchronized with the user's head movement in real time. We are trying to clarify the effects of reproducing head movement. In this paper, we evaluated the sense of incogruity induced by the delay time in reproducing head movement. The results indicate that head movement control should have a dead time shorter than 40 ms. They also suggest that the cue for the discrimination of delay is not the delay time itself. They suggest that subjects might discriminate the difference between the perception of auditory sound localization and somatosensory perception of their head posture.
