Ultrasound Can Create Virtual Objects in Mid-Air
Virtual reality environments (and computer generated media in general) are becoming increasingly realistic. Audio and visuals are already frighteningly real, and now, the next one of the five senses to be fooled by simulation is touch.
Japanese scientists have developed a way to use ultrasonic waves to simulate the feeling of touching objects that aren't physically present. Virtual objects you see on screen can be rendered through waves of ultrasound, making your body think it's touching something. This technology is in its early stages, so only a limited amount of physical characteristics can be mimicked at this point.