(Tech Xplore)—Researchers at the University of Bristol have figured out how you can whisper to someone up to 30 feet away. Their approach managed to translate facial expression into ultrasonic words.
David Lumb in Engadget said the researchers built a wearable system; its components are a speaker worn on the forehead or chest and electrodes placed on the lips and jaw.
The only “snag,” as New Scientist called it, is fairly substantial. How could one be a stellar secret message-passing agent in a crowd when staring people would find it odd that person is wearing a speaker on his head and walking around with electrodes around his mouth.
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