New AI can detect emotion with radio waves

Picture: military interrogators are talking to a local man they suspect of helping to emplace roadside bombs. The man denies it, even as they show him photos of his purported accomplices. But an antenna in the interrogation room is detecting the man's heartbeat as he looks at the pictures. A UK research team is using radio waves to pick up subtle changes in heart rhythm and then, using an advanced AI called a neural network, understand what those signals mean -- in other words, what the subject is feeling. It's a breakthrough that one day might help, say, human-intelligence analysts in Afghanistan figure out who represents an insider threat.