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Presumably you have to earth/ground the painted surfaces as you would if this was used as a shielding in equipment?

It's probably been described already in this thread, but if you want a cheap Faraday cage aluminium cooking foil is good - if you believe there is something to be protected from.

But you must...

earplugs will work for sound, but I think he's after EMF shielding.

What are those and if I wanted to detect/measure them how would I go about it?

I have a spectrum analyser, 50 MHz 'scope, field strength indicator (100 kHz to 100 MHz), magnetometer, frequency...

What are those and if I wanted to detect/measure them how would I go about it?

I have a spectrum analyser, 50 MHz 'scope, field strength indicator (100 kHz to 100 MHz), magnetometer, frequency...

Interesting website with some very useful materials for RF screening from a few khz to their stated many GHz.

But to anyone without a technical background looking to buy this material, try and...

This short video might put another perspective on the matter.

https://www.youtube.com/watch?v=wFNO2sSW-mU

Nick