Shielding a room

[Toby Paddock]

A few (or more) years ago I had a product sample 
for some stuff I think was called something like Saf-N-Shielded.
It was a non-woven metal coated fiber gauze like 
wallpaper stuff. Since it was made of random length 
random orientation fibers, it had less resonances(?). 
Also for some reason I can't remember, it seems that bonding 
the pieces together was less critical than metal screen. 
Maybe it acted a little like an absorber?
They said it was good stuff, but who knows?
Don't know how expensive.

Hey maybe some 2 foot carbon filled foam cones. 
Great acoustically too. Yea, yea, and some ferrite tiles 
behind them to bring the useable frequency down...

Sometimes there are surplus EMI shield rooms that 
can be had. You tear them down, move them, and put 
them back together. Just kidding. (Well, kind of.) 
There must be some old stand-alone tempest rooms out there.

A question: If you have an audio system in a shield room, 
do you even need shielded cables?

Sorry, must have breathed too much contact cement 
putting up those cones up at work.

 - -- -  Toby Paddock