Reply to post: Re: "...an ultrasound signal above 20 kHz..."

Is it possible to control Amazon Alexa, Google Now using inaudible commands? Absolutely

Anonymous Coward
Anonymous Coward

Re: "...an ultrasound signal above 20 kHz..."

the (Cuban) high-powered ultrasonics is a probably following the publicly well known means for transducer coupling (through the faraday) high levels of audio energy into a remote bug, conducted through the TEMPEST/EMSEC shield itself, for powering the bug and then listening to the reflected audio.

does sound a lot in concept like these social media Microphones!

more acronyms at places like this: https://www.sans.org/reading-room/whitepapers/privacy/introduction-tempest-981

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