I have to dude you on this one, dude I am as far from a cable guy as you can get! I buy Home Depot speaker wire and $5 IC’s. I just recently built all my own cables from left overs at work because due to the location of my house (a few miles from the Vacapes op area) I get USN and USCG RFI all the time. I built shielded cable for my IC’s and pwr cables and unless the Navy has stopped (not) operations they took care of the problems. It sounds like a static/buzz in the background. You can really notice it if it’s from a radar (best way to train yourself for what it sounds like), from a radar it’s just way louder and a steady cycle as it rotates. I was an instructor teaching Aural Recognition (teaching people how to listen) when I retired. If from your interweb name you live close to San Diego I can demonstrate and show you next time I have a job there. Edit: In the control ckts I work on everyday you probably couldn’t hear it but you can see it on a scope. It does cool stuff like turn pumps on and off and shit. guarantee it affects consumer audio signals.