I’ve seen some pretty clever uses for smartwatch technology, but this one is straight out of a Batman film. Researchers have developed a way to track your entire body’s movements using nothing more than ultrasonic sound waves and a smartwatch, effectively giving wearables their own form of echolocation.
Called EchoMotion, the system uses artificial intelligence to interpret sound waves bouncing off your body, working out where your joints are and how you’re moving. Developed by researchers at Cornell University, it could eventually make full-body motion tracking possible without cameras, specialist sensors or complicated equipment.

(Image credit: Cornell)