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Ultrasonic mic jammer- for real?

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Ultrasonic mic jammer- for real?

Postby Smellthevalve » Thu Feb 20, 2020 8:16 pm

Saw this advertised

http://sandlab.cs.uchicago.edu/jammer/

Apparently it's supposed to stop 'commodity microphones' from working properly; not sure if this is a new idea or something that's been tried before?
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Re: Ultrasonic mic jammer- for real?

Postby Hugh Robjohns » Thu Feb 20, 2020 9:15 pm

Ive seen similar things used before, and it would be relatively easy to engineer against if necessary as it relies primarily on inter-modulation distortions in the (cheap) impedance converter built into the back of 'commodity' electret mics or in the MEMS mics used in mobile phones and similar devices.

Not exactly a subtle 'braclet' for jamming, though, is it? And I bet the pet Labrador would be quite upset by it!, too :-)
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