It seems like every time there's a convenient new gadget released, a few months later you find out that it's been collecting your personal information or recording your conversations. In the future, that might not be so easy — not if University of Illinois researchers have anything to say about it. They've created a sound that's inaudible to humans, but can be picked up by any microphone, making it a powerful shield against spying electronics.
An Audio Disillusionment Charm
Microphones as Fast As Possible
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