Noise-canceling window sensor helps you enjoy the silence amid cacophony[ Mon, 14 Oct 2013 19:10:45 GMT ]The cacophony of any city's hammering jack hammers, beeping buses, and relentlessly yacking citizens can make anyone long for an oasis of silence. Enter the Sono, a futuristic noise-canceling gadget that sticks on the window and turns even the noisiest of rooms into a chill place to think.