> Subject: [TSCM-L] Re: Acoustic Absorbing Materials
> From: trixter aka Bret McDanel <tri..._at_0xdecafbad.com>
> To: TSCM-..._at_googlegroups.com
> Date: Mon, 18 Sep 2006 23:00:27 +0100
>
>
> On Mon, 2006-09-18 at 16:17 -0500, TSCM/SO Group wrote:
> > An AM or FM Radio tuned between stations will generate enough noise to mask
> > conversations.
> > As far as ventilation goes, ducting with multiple 90 degree bends will help
> > limit audio, as well as air flow, albeit in a good scif there are usually no
> > ducts at all.........
>
> And if no one is paying attention but someone does a frequency sweep
> they will know the frequency its tuned to (because as soon as they hit a
> carrier on the given freq it goes silent - this can be done at night
> when no one is around).
>
> They can then transmit known predictable noise instead of random and
> filter it, or if no one is really paying attention just transmit a good
> clean carrier that causes it to go silent on demand.
>
> And what do you mean there is no ducts in good scifi? I cant tell you
Not "scifi" but SCIF (Secure compartmented info facility - I think)
> the number of movies I have seen where very large men with bulky weapons
> are crawling through the ducts almost upright searching for something :P
>
>
> --
> Trixter http://www.0xdecafbad.com Bret McDanel
> Belfast IE +44 28 9099 6461 DE +49 801 777 555 3402
> Utrecht NL +31 306 553058 US WA +1 360 207 0479
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>
>
> >
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Received on Sat Mar 02 2024 - 00:57:21 CST