Shielding?

ROBSCIX · 27th October 2006, 04:20 PM

Hello, I hope I am in the right place. O if placing a highly sensitive audio circuit into a "Noisy" evironmet with EMI and RF is it a good idea to shield the circuit? -What I am taling about is findind a way to design sheilding for a PCI soundcard. Everybody says how noisy the inside of a PC is so wouldn't this be a good idea? How would I go about it? m I am doing research but figured I would ask here..
I hope it's in the right place...
So I want to sheild or isolate a circuit from interference from EMI and RF...and ideas?

koyaanisqatsi · 27th October 2006, 04:33 PM

copper.... foil or sheets

u could shield the wires gfoing in and out too... u can buy copper braid for this

ROBSCIX · 27th October 2006, 04:51 PM

not so much the wires..well I didn't consider them at first. I mean the PCI card itself. AS it has to pick up alot of noise from the busses. so how would one go about it? Wrap the circuitry in masking tape then a metal connductor such as copper then ground the sheilding plate? would this prevent EMI and RFI from getting to the circuits? or is ther a better way to do it? DO you know of any links that speak on this subject or ways of doing it? Thx for your response...much appreciated.

koyaanisqatsi · 27th October 2006, 05:02 PM

i'd be tempted to use a copper sheet and bend it into a housing... if there is room...

i dont know of any sites though..... but shouldn't be difficult... and would be most effective

ROBSCIX · 27th October 2006, 05:05 PM

yeah, just a enclosure on all four side to sheild the circuits. wouldn't the sheilding need to be grounded? or the copper would work without grounding?

koyaanisqatsi · 27th October 2006, 05:13 PM

sure ground it... but if its connected to the pc case then it'll be grounded already... more wont hurt

ROBSCIX · 27th October 2006, 05:19 PM

I don't understand why this isn't done for soundcards though? Maybe it doesn't work as good as I think it would so that's why companies don't bother to do it. Also a bunch of circuits look better than a block of copper.

koyaanisqatsi · 27th October 2006, 05:28 PM

it'll have an audiable effect...

very few things in life come optimized... dont ask me why... an extra few dollars in the manufacturing of most things would make a world of difference

27th October 2006, 04:20 PM	#1
ROBSCIX diyAudio Member Join Date: Oct 2004	Sheilding? Hello, I hope I am in the right place. O if placing a highly sensitive audio circuit into a "Noisy" evironmet with EMI and RF is it a good idea to shield the circuit? -What I am taling about is findind a way to design sheilding for a PCI soundcard. Everybody says how noisy the inside of a PC is so wouldn't this be a good idea? How would I go about it? m I am doing research but figured I would ask here.. I hope it's in the right place... So I want to sheild or isolate a circuit from interference from EMI and RF...and ideas?

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27th October 2006, 04:33 PM	#2
koyaanisqatsi diyAudio Member Join Date: Oct 2006	copper.... foil or sheets u could shield the wires gfoing in and out too... u can buy copper braid for this

27th October 2006, 04:51 PM	#3
ROBSCIX diyAudio Member Join Date: Oct 2004	not so much the wires..well I didn't consider them at first. I mean the PCI card itself. AS it has to pick up alot of noise from the busses. so how would one go about it? Wrap the circuitry in masking tape then a metal connductor such as copper then ground the sheilding plate? would this prevent EMI and RFI from getting to the circuits? or is ther a better way to do it? DO you know of any links that speak on this subject or ways of doing it? Thx for your response...much appreciated.

27th October 2006, 05:02 PM	#4
koyaanisqatsi diyAudio Member Join Date: Oct 2006	i'd be tempted to use a copper sheet and bend it into a housing... if there is room... i dont know of any sites though..... but shouldn't be difficult... and would be most effective

27th October 2006, 05:05 PM	#5
ROBSCIX diyAudio Member Join Date: Oct 2004	yeah, just a enclosure on all four side to sheild the circuits. wouldn't the sheilding need to be grounded? or the copper would work without grounding?

27th October 2006, 05:13 PM	#6
koyaanisqatsi diyAudio Member Join Date: Oct 2006	sure ground it... but if its connected to the pc case then it'll be grounded already... more wont hurt

27th October 2006, 05:19 PM	#7
ROBSCIX diyAudio Member Join Date: Oct 2004	I don't understand why this isn't done for soundcards though? Maybe it doesn't work as good as I think it would so that's why companies don't bother to do it. Also a bunch of circuits look better than a block of copper.

27th October 2006, 05:28 PM	#8
koyaanisqatsi diyAudio Member Join Date: Oct 2006	it'll have an audiable effect... very few things in life come optimized... dont ask me why... an extra few dollars in the manufacturing of most things would make a world of difference