OK, so, a bit of background here.
A friend of my father's had a tube-bodied Corvette that he likes to race every once in a while. He's got an in-car camera (which consists of a hand-held DV cam that records to SD cards) and an external microphone wired to the camera. He gave me the card in the hopes I could get the video to DVD.
Being a race car, it is, of course, extremely noisy. To combat that, he wrapped the microphone up in a bunch of those blue shop towels and wrapped it up in racing tape (like duct tape). Worked surprisingly well.
The problem, however, is that he's getting a ton of EFI from the MSD ignition system, which is pumping out something like 40,000 volts. The camera, unfortunately, is/was placed only about a foot away from said ignition system.
Are there options to somehow shield the microphone cable from that much EFI, or is it something of a lost cause? I'm a DJ on the side, and the cables we use are shielded, but not from something as powerful as that.