Vibrotactile devices are commonly used in applications for sensory substitution or to provide feedback in virtual reality. An important aspect of vibrotactile perception is spatial acuity, which determines the resolutions of vibrotactile displays on the skin. However, the complex vibration characteristics of vibrotactile actuators make it challenging for researchers to reference and compare previous study results. This is because the effects of typical characteristics, such as intensity and frequency, are not well understood. In this study, we investigated the effects of intensity and frequency on vibrotactile spatial acuity. Using Linear Resonant Actuators (LRAs), we conducted relative point localization experiments to measure spatial acuity under different conditions. In the first experiment, we found that intensity had a significant effect on spatial acuity, with higher intensity leading to better acuity. In the second experiment, using a carefully designed intensity calibration procedure, we did not find a significant effect of frequency on spatial acuity. These findings provide a better understanding of vibrotactile spatial acuity, allow for comparisons to previous research, and provide insights into the design of future tactile devices.

中文翻译：

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研究强度和频率对振动触觉空间敏锐度的影响


振动触觉设备通常用于感觉替代或在虚拟现实中提供反馈的应用。振动触觉感知的一个重要方面是空间敏锐度，它决定了皮肤上振动触觉显示的分辨率。然而，振动触觉执行器复杂的振动特性使得研究人员很难参考和比较先前的研究结果。这是因为强度和频率等典型特征的影响尚不清楚。在这项研究中，我们研究了强度和频率对振动触觉空间敏锐度的影响。使用线性谐振执行器（LRAs），我们进行了相对点定位实验来测量不同条件下的空间敏锐度。在第一个实验中，我们发现强度对空间敏锐度有显着影响，强度越高，敏锐度越好。在第二个实验中，使用精心设计的强度校准程序，我们没有发现频率对空间敏锐度的显着影响。这些发现可以更好地理解振动触觉空间敏锐度，可以与之前的研究进行比较，并为未来触觉设备的设计提供见解。