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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical RE: $400 million network upgrade for the Pentagon
"fold back" systems like Bose noise cancelling headsets depend on the microphones being adjacent to each other. The further apart they are the more difficult it becomes to "sync" the noise. A digital delay helps but at some point of source divergence even it won't help. Of course these measures are designed for inadvertent release of information. Anyone with a window shouldn't be discussing things worth eavesdropping on anyway. But in the real world...hence the air pipes. Not that I would know anything about this sort of thing... ;0 Best regards, _________________________ Alan Rowland -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Blake Fithen Sent: Tuesday, August 13, 2002 3:13 PM To: 'Brad Knowles'; 'gg'; 'Sean Donelan'; [email protected] Subject: RE: $400 million network upgrade for the Pentagon > Brad Knowles: > The Pentagon has windows. It also has an ancient system of air > pipes aimed at all of the windows... <paranoia> Is this sensitive info? Couldn't someone (theoretically) aim a "beam" at an unoccupied office and another at their objective office then filter out the 'noise'? </paranoia> Sorry for the O.T. -- blake > Brad Knowles, <[email protected]> > > "They that can give up essential liberty to obtain a little temporary > safety deserve neither liberty nor safety." > -Benjamin Franklin, Historical Review of Pennsylvania. > > GCS/IT d+(-) s:+(++)>: a C++(+++)$ UMBSHI++++$ P+>++ L+ !E > W+++(--) N+ !w--- > O- M++ V PS++(+++) PE- Y+(++) PGP>+++ t+(+++) 5++(+++) > X++(+++) R+(+++) > tv+(+++) b+(++++) DI+(++++) D+(++) G+(++++) e++>++++ h--- > r---(+++)* z(+++) >
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