Reply Sat 1 Nov, 2008 06:53 am
what can you use in building a building to keep all radio frequencies from entering, or exiting said building? looking for countrer surviellance methods to incorporate during during consrtuction of a building.
 
Butrflynet
 
  2  
Reply Sat 1 Nov, 2008 11:28 am
@rocksoildo,
tin foil
roger
 
  1  
Reply Sat 1 Nov, 2008 11:35 am
@Butrflynet,
Are you sure? I'm looking to do some shoplifting for Christmas gifts pretty soon.
Butrflynet
 
  2  
Reply Sat 1 Nov, 2008 11:46 am
@roger,
That's what that NSA dude from the movie Enemy of the State told Will Smith's character.


Wink
kuvasz
 
  2  
Reply Sat 1 Nov, 2008 11:51 am
@Butrflynet,
You're right, it seems to work on all radio frequencies according to the FCC.

http://sonicchicken.net/blog/wordpress/wp-content/tinfoil_hat.jpg
roger
 
  1  
Reply Sat 1 Nov, 2008 12:02 pm
@kuvasz,
Awright! I'm going shopping!
0 Replies
 
Region Philbis
 
  1  
Reply Sat 1 Nov, 2008 01:45 pm
@Butrflynet,
awesome flick...
0 Replies
 
fishin
 
  3  
Reply Sat 1 Nov, 2008 05:04 pm
@rocksoildo,
What you seek is called a "Faraday Cage". Basically, they imbed wire mesh screen into the walls of the building while it is being built. Then you add filters to the power and signal lines that penetrate the wire mesh enclosure.

The U.S. Military's EMSEC program has very detailed guidelines for building desgins that render them electronicly silent.
0 Replies
 
Robert Gentel
 
  2  
Reply Sat 1 Nov, 2008 05:43 pm
@rocksoildo,
Sheet metal could work. Here are some articles to learn more about this:

http://en.wikipedia.org/wiki/Faraday_cage

http://en.wikipedia.org/wiki/Electromagnetic_shielding
0 Replies
 
Ragman
 
  2  
Reply Sat 1 Nov, 2008 05:49 pm
@rocksoildo,
Use a material that is called mu (Greek) metal. And of course, it could be that building a Faraday cage could do it too. Super expensive to do, however. Be aware that sheet metal would have to using the right sort of metal.
0 Replies
 
Brandon9000
 
  1  
Reply Sat 1 Nov, 2008 06:07 pm
@rocksoildo,
Any conducting metal will do, and, as fishin said, it can be just a mesh. The criterion is that the mesh size is small compared to the wavelength.
0 Replies
 
 

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