Ultrasonic bracelet jams the microphones around you | Engadget - discu.eu

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Ultrasonic bracelet jams the microphones around you https://www.engadget.com/2020/02/15/ultrasonic-microphone-jamming-bracelet/ 12 comments 17/2/2020 technology

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Wearable Microphone Jamming http://sandlab.cs.uchicago.edu/jammer/ 192 comments

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