This AI Uses Echolocation to Identify What You're Doing Ifeadi C. 11:01 Feed: All Latest, Zero Tech Blog A research team built a device that can emit an ultrasonic pitch and pick up its echoes to tell if a person is sitting, standing, or walking. via Zero Tech Blog Share this Share on FacebookTweet on TwitterPlus on Google+ Related PostsElderly YouTuber writes his subscribers down in a notebook, then thanks them individuallyJack Dorsey continues to string people along by teasing 'edit tweet' featureTitanfall takes aim on 'Fortnite' with 'Apex Legends,' a free-to-play battle royale gamePeriscope makes live broadcasts more like talk showsHow to Quit JUULTesla plans to buy energy storage company for $218 million