Sonic Haptic Feedback Device

High-resolution, high-frequency haptic feedback using sound

I really just want to figure out what Ultrahaptics (http://spectrum.ieee.org/view-from-the-valley/consumer-electronics/gadgets/tiny-bubbles-and-force-fields-feeling-the-virtual-world-with-ultrasound) are doing and want to explore the space of using sound (ultrasonic or tactile) to generate haptic feeback.

Doing some more research into this now, will have a clearer picture when I figure out my parts