This Cyberpunk Bracelet Jams Any Spying Microphones Nearby “Bracelet Of Silence” February 15, 2020 https://futurism.com/the-byte/cyberpunk-bracelet-jams-spying-microphones The New York Times: Activate This ‘Bracelet of Silence,’ and Alexa Can’t Eavesdrop
What, so the ultrasound is loud enough to cut mic gain enough to put audible frequencies down in the noise? That's a pretty cool exploit on the wide frequency response of smartphone mics Analogous to those cross-device tracking apps, which use ultrasound carriers for data. This might be louder, though. And children can hear some "ultrasonic" frequencies. Plus various pets, of course. And I vaguely recall that loud ultrasound can basically make people nervous, or maybe cause headaches, even if they can't hear it. So there could be problems. But altogether, a very cool thing! My wife makes jewelry, so maybe this could be a popular line for her
Sorry, what was that, I didn't hear you. If this prototype is working that well now, it could become a game changer as the device becomes smaller and more effective.
