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Electrical Noise Causing Physiological Stress?

xodonex Re:Subsonics/Supersonics (401 comments)

I'd guess it is a fairly common (but fairly unknown) phenomenon, that sound frequencies just above your audible range can be *felt*. I can (unreliably) *feel* sound in the 19-20kHz range, and *reliably* hear a TV (PAL uses 25 fps, 625 lines/image, which gives a frequency of 15.6 kHz). Certain TV cameras (e.g. surveillance cameras) are audible, too. I'd bet that your'e going to find up one of those in the mall.

more than 8 years ago

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