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Ultrasonic bracelet jams the microphones around you

Smart speakers and other microphone-equipped devices aren’t supposed to listen all the time, but there might be a solution if you aren’t willing to take any chances.

https://www.engadget.com/2020/02/15/ultrasonic-microphone-jamming-bracelet/

origin - https://www.pipiscrew.com/2020/02/ultrasonic-bracelet-jams-the-microphones-around-you/ ultrasonic-bracelet-jams-the-microphones-around-you

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