Re: Noise questions



Mike Rivers wrote:

There was a recent discussion, I think here, about building a shielded
room (Faraday cage). It's not very practical but it works.

My friends at Westwick Installations
http://westwick.com/
have overseen the installation of several Faraday cages in studios in London.
I've been involved in site surveying for one of them recently in fact. Amongst
other things we used a guitar pickup to see what the ambient field is like. This
one had a lot of magnetic field from railway signalling currents (there's a line
at the back) around 400Hz and 2 kHz IIRC (as well as the usual power line
related frequencies).

Just ensure that fitting a Faraday cage is done whilst you're working on a shell
of a building though!


Graham


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