Why do researchers use copper wire for there voice recorders

[The yowie Mrx]

Why do researcher use copper wire for there voice recorders to stop the EMF.
Would lead sheeting work better?

[Mike Williams]

Why do researcher use copper wire for there voice recorders to stop the EMF.
Would lead sheeting work better?

Not many researchers bother..at least in chasing weird animals..Joe was chatting about it at one stage though..
But..for large projects, some labs may use faraday cages...instead of lead due to cost/weight etc.
http://en.wikipedia.org/wiki/Faraday_cage

Mike

[The yowie Mrx]

Seen a lot of that stuff in the mines when I was working as a tribology ( Greasemonkey ).
So is it the same stuff as pc tower .If it is I got an idear for a old tower.
Cheers Mike.