Ok, so I thought for a while that it was a poor quality audio chip on my motherboard that was leading to the hissing/popping/crackling that I could hear through the audio header on my computer case. It is all the more noticeable because I use ear buds when on the computer.
So I recently upgraded to a fancy-schmancy new MB thinking that this issue would resolve itself. No such luck. In fact, its probably worse than before.
Now, I believe its actually the wire that connects the audio header to the front panel that's picking up EM radiation from all the internal components that contributes to this. Why do I say that? Because it seems the noise is most sensitive to things like the dvd-Rom spinning up or, say, the fans changing speeds. The proximity of the audio header wire to the internal components seems to make this explanation feasible. To make things neat, I have the wire running close to the motherboard pcb, since the header is close to the back panel, then around the socket area towards the PSU, then a turn so that it runs along the top side of the MB over to the DVDRom drive where the panel is located (on the top of the computer case).
So here's my question. How can I shield this cable for the lowest cost possible? Is shielding even possible? Seems like simply wrapping it with aluminum foil is a bad idea since it would potentially cause shorts on the mb where it comes in contact. Layer alum foil and cover with electrical tape? Should there be a ground wire? Ground it against the metal part of the case? Or maybe this is hopeless and I should simply look for a set of ear phones that might filter out the additional noise?
So I recently upgraded to a fancy-schmancy new MB thinking that this issue would resolve itself. No such luck. In fact, its probably worse than before.
Now, I believe its actually the wire that connects the audio header to the front panel that's picking up EM radiation from all the internal components that contributes to this. Why do I say that? Because it seems the noise is most sensitive to things like the dvd-Rom spinning up or, say, the fans changing speeds. The proximity of the audio header wire to the internal components seems to make this explanation feasible. To make things neat, I have the wire running close to the motherboard pcb, since the header is close to the back panel, then around the socket area towards the PSU, then a turn so that it runs along the top side of the MB over to the DVDRom drive where the panel is located (on the top of the computer case).
So here's my question. How can I shield this cable for the lowest cost possible? Is shielding even possible? Seems like simply wrapping it with aluminum foil is a bad idea since it would potentially cause shorts on the mb where it comes in contact. Layer alum foil and cover with electrical tape? Should there be a ground wire? Ground it against the metal part of the case? Or maybe this is hopeless and I should simply look for a set of ear phones that might filter out the additional noise?
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