LAS VEGAS -- Waving your hand over a phone or tablet instead of touching the screen is cool in theory, but often jerky or temperamental in practice. Elliptic Labs is rewriting the rules of touch-free gestures using the sense of sound.
When you turn on gesture control, ultrasonic speakers begin emitting sound waves above 20kHz, outside the range of human hearing. These waves hit your hand, then bounce back to the listening microphones. From there, software turns signals into action.
Touchless inputs generally use camera optics or infrared to get their gestural commands, which means you need to be fairly … Read more