FastCompany Joe Paradiso and Yasuhiro Ono of the Massachusetts Institute of Technology have just patented a system for a roving cone of silence, so that you can walk around your office building without anyone ever eavesdropping on you.
The inventors are trying to fix a common problem in open-plan offices: the sound of conversations that carry across the room, making your every phone call into fodder for other people's gossip sessions. So they devised a sound-damping sensor, comprised of an infra-red motion-detector, a speaker and a microphone. These would be scattered around the walls of an office. You can then activate your personal mute button from your computer. The system locks onto you, identifies anyone close enough to eavesdrop, and hits them with a murmur of white noise so they can't hear you.
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