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 PostsTa-Nehisi Coates dismantles John Kelly's alternative Civil War 'facts'Beauty pageant contestants recite facts about domestic violence instead of listing of bra sizeNadiya Hussain reflects on racist abuse she received since winning the 'Great British Bake Off'Even people with tiny hands can use the iPhone XLook at this very proud grandpa posing next an indoor orange tree he grew from a seedUp your French fry game with this 5-in-1 mandoline slicer that's on sale