To perceive 3D shapes such as pyramids, the perception of planes and edges as tactile sensations is an essential component. This is difficult to perceive with the conventional vibrotactile sensation used in ultrasound haptics because of its low spatial resolution. Recently, it has become possible to produce a high-resolution pressure sensation using airborne ultrasound. By using this pressure sensation, it is now possible to reproduce a linear, sharp-edged sensation in the area of a fingerpad. In this study, it is demonstrated that this pressure sensation can be used to reproduce the feeling of fine, sharp edges, and its effectiveness is confirmed by comparing it with conventional vibrotactile sensation. In the demonstration, participants can experience the contact sensation of several types of edges with different curvatures.

翻译：为感知金字塔等三维形状，将平面与边缘作为触觉感知是至关重要的组成部分。由于传统超声触觉技术中采用的振动触觉空间分辨率较低，难以实现此类感知。近年来，利用空气超声产生高分辨率压力感知已成为可能。借助这种压力感知技术，现可在指腹区域再现线性锐利边缘的触感。本研究论证了该压力感知技术能够复现精细锐利边缘的触感，并通过与传统振动触觉的对比验证了其有效性。演示过程中，参与者可体验多种不同曲率边缘的接触感知。