At 04:54 AM 10/18/2008, John Young wrote:
... also that music is played within the glass layers to garble vibration emanations.
Anyone know of this music system or where more information could be obtained?
During the Clinton Administration is was Fleetwood Mac; these days it's primarily country & western.... More seriously, spooks have done that kind of thing for a long time - voices in a room will shake the windows a bit, and that can theoretically be detected by bouncing microwaves or ultrasonics or whatever off of them (presumably easier to detect with metallic surfaces than glass), and the music drowns that out.
On related topic, "buckypaper" is claimed to provide up to 10 times more radiation protection than current Air Force requirements: http://biz.yahoo.com/ap/081017/tec_buckypaper.html
Interesting. On the other hand, back when I had experience with TEMPEST rooms in the mid-80s, the leakage difficulties weren't the main walls, but sealing all the joints; a surprisingly small gap is enough to let signals out, and leakage is wavelength-dependent. Back then our computers were Vaxen running at tens of MHz (though we usually tested with higher frequencies) - now the computers are running at tens of GHz, and I'd guess that shielding is a lot harder.