Hi
I have a small bedroom recording studio full of electromagnetic fields (mainly 50hz+harmonics up to ~3,5khz from power cables in walls).
Here is how it looks on Adobe Audition's spectrum analyzer:
http://img158.imageshack.us/img158/4522/dirtysilence7th.jpg
I'm planning to build a 2m x 2m Faraday's cage/booth to protect active electric guitar pickups from external electrostatic and electromagnetic noise 20hz-96khz
Please suggest best material (copper ? aluminium ? iron ? or maybe a combination of different metals), how thick should it be and how to get rid of the current in a situation where no true ground is available.
How many dBs of attenuation should i expect ?
Thanks in advance.
I have a small bedroom recording studio full of electromagnetic fields (mainly 50hz+harmonics up to ~3,5khz from power cables in walls).
Here is how it looks on Adobe Audition's spectrum analyzer:
http://img158.imageshack.us/img158/4522/dirtysilence7th.jpg
I'm planning to build a 2m x 2m Faraday's cage/booth to protect active electric guitar pickups from external electrostatic and electromagnetic noise 20hz-96khz
Please suggest best material (copper ? aluminium ? iron ? or maybe a combination of different metals), how thick should it be and how to get rid of the current in a situation where no true ground is available.
How many dBs of attenuation should i expect ?
Thanks in advance.