https://www.selleckchem.com/pr....oducts/luzindole.htm
We present UltraButton a minimalist touchless button including haptic, audio and visual feedback costing only $\$ $200. While current mid-air haptic devices can be too bulky and expensive (around $\$ $2 k) to be integrated into simple mid-air interfaces such as point and select, we show how a clever arrangement of 83 ultrasound transducers and a new modulation algorithm can produce compelling mid-air haptic feedback and parametric audio at a minimal cost. To validate our prototype, we compared its haptic output to a commercially-avail