Sofia Katherine O, Jones Lynette A
IEEE Trans Haptics. 2013 Jul-Sep;6(3):320-9. doi: 10.1109/TOH.2013.1.
Tactile displays are often used to present spatial cues about the environment, although the optimal configuration of a display used for spatial cuing is not known. The objective of the present set of experiments was to characterize the properties of surface waves induced by vibrotactile stimulation and to determine if the propagation of surface waves was a factor influencing the ability to localize a point of stimulation in a tactile display. Three sites on the body were tested: the palm of the hand, the forearm, and the thigh. An accelerometer array was fabricated and used to measure the surface waves. The results indicated that there were significant differences between glabrous and hairy skin in terms of the frequency and amplitude of oscillation of the motor. Analyses of the motion of the surface waves across the skin indicated that they were markedly attenuated at 8 mm from the motor, but even at 24 mm the amplitude was still above perceptual threshold. The localization experiment indicated that subjects were much better at identifying the site of stimulation on the palm as compared to the forearm and thigh, and that the latter two sites were not significantly different.
触觉显示器常用于呈现有关环境的空间线索，尽管用于空间提示的显示器的最佳配置尚不清楚。本系列实验的目的是表征由振动触觉刺激引起的表面波的特性，并确定表面波的传播是否是影响在触觉显示器中定位刺激点能力的一个因素。对身体上的三个部位进行了测试：手掌、前臂和大腿。制作了一个加速度计阵列并用于测量表面波。结果表明，在运动振荡的频率和幅度方面，无毛皮肤和有毛皮肤之间存在显著差异。对表面波在皮肤上运动的分析表明，它们在距离电机8毫米处明显衰减，但即使在24毫米处，振幅仍高于感知阈值。定位实验表明，与前臂和大腿相比，受试者在识别手掌上的刺激部位方面要好得多，而后两个部位没有显著差异。
