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Subharmonics? Additive waves? What was the source and why?
by alsoconfuzed 9y ago
Subharmonics? Additive waves? What was the source and why?
- dgacmu 9y agoInstead of the ieee summary, check the original paper: https://spqr.eecs.umich.edu/papers/YanFuXu-Cuba-CSE-TR-001-18.pdf https://spqr.eecs.umich.edu/papers/YanFuXu-Cuba-CSE-TR-001-1... It's better and more careful not to over claim.
- trdtaylor1 9y agoJust reading through that, the unanswered questions are literally the same questions asked before the research began.
- beautifulfreak 9y agoTheir paper doesn't identify where the signals came from. "The emitter source remains an open question, but could range from covert ultrasonic exfiltration of modulated data to ultrasonic jammers of eavesdropping devices or perhaps just ultrasonic pest repellents. It’s also possible that someone was trying to covertly deliver data into a localized space using ultrasound to say, activate a sensor or other hidden device."