Tapping sounds by echolocation and body sway by the blind

我们试图证明身体摇摆和虚拟敲击声音运动之间的关系。我们开发了一个虚拟的敲击声音呈现系统，听者通过回声定位来感知物体。实验条件为：(1)来回轻拍运动，(2)来回虚拟轻拍声音运动与环境噪声（粉红噪声），(3)无声音，(4)虚拟轻拍声音横向运动，(5)虚拟轻拍声音横向运动与环境噪声。结果表明：(1)无声音条件下不存在身体摇摆；(2)即使存在个体差异，身体摇摆对虚拟声音的前后方向和横向运动都有响应；(3)虚拟敲击声运动和环境噪声条件使盲人参与者的身体摇摆比虚拟敲击声运动更大。我们还尝试开发声学系统，仅使用粉红噪声来呈现虚拟的间隔空间。我们让一个盲人评估他面前的空间。然而，很难认出它。我们必须考虑这个系统。

We attempted to demonstrate the relationship between body sway and virtual tapping sounds motion. We developed a virtual tapping sounds presentation system which listeners perceive objects by echolocation. Experimental conditions were : (1)tapping motions in back and forth direction, (2)virtual tapping sounds motion and environmental noise (pink noise) in back and forth direction, (3)no sound, (4)virtual tapping sounds motion in lateral direction, and (5)virtual tapping sounds motion and environmental noise in lateral direction.Results were : (1)no sound condition indicated no body sways, (2)body sway responded to virtual sounds motion both in back and forth direction and lateral direction even if there individual difference, (3)virtual tapping sounds motion and environmental noise condition made blind participants larger sways rather than virtual tapping sounds motion.We also attempted to develop acoustic system which presented a virtual interspace using only pink noise. We asked a blind person to evaluate to perceive an interspace in front of him. However, it was hard to recognize it. We have to consider this system.