Comment Re:From Wikipedia... (Score 4, Informative) 627
That's not radiation, that's because cheap CRTs tubes oscillate at 60 hertz and if you're not deaf in the upper frequencies you can hear them whine. Basically it's noise from the flyback transformer in the CRT. Many children can hear them but people often lose those frequencies as they get older.
I can still hear when a cheap CRT is on but I don't claim to be allergic to wifi.
See http://www.pcguide.com/ts/x/comp/crt/failWhine-c.html for some more info.