Human Technology Interaction, Eindhoven University of Technology, Eindhoven, The Netherlands.
Elitac Wearables B.V., Utrecht, The Netherlands.
Perception. 2024 Sep;53(9):619-631. doi: 10.1177/03010066241258969. Epub 2024 Jun 11.
Vibrotactile feedback can be built into clothing such as vests. This means that often vibrotactile information is presented to the back. It is known that the back has a relatively low spatial acuity. Spatial acuity varies across different limbs and sometimes with different locations on a limb. These known anisotropies suggest that there might be systematic variations in vibrotactile spatial acuity for different areas of the back and also for different orientations (i.e. horizontal vs. vertical). Here we systematically measured spatial acuity in four areas of the back for both horizontal and vertical orientations. The results show no significant differences in spatial acuity for the back areas that were tested. Spatial acuity was, however, higher in the horizontal direction than in the vertical direction by roughly a factor of two. This means that when designing vibrotactile displays for the back the tactor density can be lower in the vertical direction than in the horizontal direction and density should be constant for different areas of the back.
振动触觉反馈可以内置到背心等衣物中。这意味着通常振动触觉信息会被传送到背部。众所周知，背部的空间分辨率相对较低。空间分辨率在不同肢体之间以及同一肢体的不同位置上有所不同。这些已知的各向异性表明，背部的不同区域以及不同方向（即水平与垂直）的振动触觉空间分辨率可能存在系统差异。在这里，我们针对水平和垂直方向，系统地测量了背部四个区域的空间分辨率。结果表明，测试的背部区域的空间分辨率没有显著差异。然而，水平方向的空间分辨率比垂直方向高约两倍。这意味着在为背部设计振动触觉显示器时，垂直方向的传感器密度可以低于水平方向，并且背部不同区域的密度应该保持一致。
