Sonar on stock smartwatches leads to hand-tracking advancement

Imagine tapping your thumb and index finger together twice to skip to the next song or clicking around your laptop or desktop computer without a mouse, using discreet finger motions. New first-of-its-kind wearable technology from researchers at Cornell and KAIST, in South Korea, brings that vision closer to reality. The system, called WatchHand, equips off-the-shelf smartwatches with AI-powered micro sonar capable of tracking hand movements.