ultrasound

Norwegian firm Elliptic Labs is employing ultrasound technology to improve existing gesture controls. As with medical ultrasound scans, the gadget sends out soundwaves at frequencies humans cannot hear. The device then measures how long these ... soundwaves -- which are affected by the position and distance of any objects in the way -- take to return. This allows it to track any movements, such as somebody gesturing with a wave or a swipe of the hand. Sound Allows Easier Control Than Light Samsung uses a similar gesture control system with its Galaxy S4 smartphone, but that works through infrared ... (view more)