my fellow geeks of the Interweb: we may have some serious experimental fun on our hands, the kind that were i twelve years old i should spell "phun". i've recieved a reply from the admin of cryptome.org, who i won't name out of respect:
You're on the right track. Audial leakage of surveillance equipment is
used by counter-surveillance experts to pick up inadvertent signals.
Audial emanations of other electronic equipment are certainly
likely but I've not seen a study of it.
Let me know what you come up with, we've not published anything
on audial TEMPEST.
what time is it? it's EXPERIMENTATION TIME.