North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical RE: $400 million network upgrade for the Pentagon
On Wed, 14 Aug 2002, Brad Knowles wrote: > > At 5:13 PM -0500 2002/08/13, Blake Fithen wrote: > > > 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'? > > Actually, I don't know for sure how it's implemented. They may > have separate sound streams for each window. Moreover, this was a > few years ago (I left in 1995), and there may have been changes since > then. It would certainly be a lot easier to use individual speakers > fed by electrical wiring, than pumping a lot of air around from a > central location. Even easier is to glue a piezoelectric transducer to the glass and feed it some noise modulated to look like speech from a gadget which may cost entire $30 in parts. Detecting IR laser emissions and sounding alarm is also a good idea :) --vadim
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