空中超音波触覚ディスプレイにおける触感の空間解像度向上

抄録

In this paper, a midair tactile display using a 70 kHz airborne ultrasound was examined. First we fabricated a 70 kHz ultrasound phased array. Next, we measured the physical properties of the ultrasound converging beam and confirmed the successful improvement of focusing, compared with the conventional 40 kHz ultrasound. Finally, we examined the psychophysical effect by the focusing improvement. The minimum perceivable radiation force for 70 kHz focal spot was smaller than that for 40 kHz case and the smaller focal spot was easier to perceive. We also conducted a comparison test of the perceived force area with real contacts.