did-you-kno: There’s a device called Soundlazer that can project audio to a specific location through a narrow, ultrasonic beam. If you used one, you could play a song for your friend across the room and have only them hear it. Source
did-you-kno: There’s a device called Soundlazer that can project audio to a specific location through a narrow, ultrasonic beam. If you used one, you could play a song for your friend across the room and have only them hear it. Source
![Thestarsareourancestors: [X]](https://64.media.tumblr.com/a8570ac170f05bb00cc429f4a9c1334c/tumblr_msiud9ywE71rut1rdo1_250.gif)
