Face it, you can’t hide
I wouldn’t have believed it if I saw it on “NCIS”: Israeli researchers have figured out a way to spy on your computer by the vibrations of the cooling fan. Using a smartphone.
Bonus: The same people already demonstrated spying “to a nearby smartphone through FM signals emitted by the screen cable.”
Bonus 2: This is an extension of Van Eck Phreaking — reading the residual radiation from monitors.