The use of ultrasound waves allows the device to produce audible noise as well as a physical sensation.

“Even if not audible to us, ultrasound is still a mechanical wave and it carries energy through the air,” researcher Diego Martinez Plasencia said in the press release. “Our prototype directs and focuses this energy, which can then stimulate your ears for audio, or stimulate your skin to feel content.”

The researchers envision future versions of the device making use of multiple beads to create even more detailed holograms. And perhaps even more exciting than the prototype itself is the fact that, unlike many cutting-edge technologies, this one might not have too much difficulty making the leap to consumer product.