Ultrasound could waken a sleeping smart home

 The home of the future, we are assured, will be swarming with tiny sensors: security cameras, carbon monoxide detectors, speakers and everything else. Few need to be running all the time — but how do you wake them up when they’re needed if they’re off in the first place? Ultrasound. Read More

from Gadgets – TechCrunch http://ift.tt/2EGbMJ2
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