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| Topic | US believes Russia is targeting gov't officials with invisible weapon near DC |
| Xavier_On_High 06/08/21 12:15:14 PM #23: | Pogo_Marimo posted... That... Doesn't make sense. Why would you direct high-powered EM radiation at someone in order to receive soundwaves? The only thing EM radiation carries back with it when it bounces off something are its vector and energy (wavelength, intensity, frequency). As far as I know, there's no way to interpret a sound wave through EM radiation. It's hard enough to calibrate a RADAR to interpret the shape of an opaque, solid object. I also can't imagine a device which is accidentally emitting tremendous amounts of EM radiation at a specific target. Once a basic outstanding of the device is achieved it would be trivial to find out if one is used nearby, which doesn't make sense from an espionage perspective. I've read various articles about technology that uses reflected EM radiation to measure the density of air as sound waves pass through it in order to hear at a distance. Another technology uses lasers to detect vibrations on the glass of the windows of rooms in which conversations are happening. I think it was speculative, but I can't see any reason why these technologies wouldn't work, though obviously it would be incredibly complicated accounting for interference. --- ... Copied to Clipboard! |
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