I can't speak for cables or interconnects but I had a noise issue with a tube preamp that regular Tin foil cured.
I had hooked up an older tube preamp in my living room about a year ago. Right next to the TV..a couple feet away from a modem & router as well. The pre was putting a lot of noise in the chain. I switched out the tubes thinking they might have gone extremely microphonic sitting in the garage unused for over a year.
New tubes made no difference. As I was jiggling & checking the rca inputs/outputs I noticed a change in the noise. Went into the kitchen and ripped off a square of Reynolds Wrap tin foil. Laid it over the back of the preamp & all the noise went away. Like wow. Obviously it looked pretty silly so I moved the preamp into the spare bedroom system which has no digital or wifi products. No issues in that room with that preamp & noise. In the living room that little piece of thick aluminum foil was definitely blocking some intrusive noise wavelengths.