Have alternator whine over my headset and more noticeably thru earbuds on my '98 SE 1500. Have tried to trace it down for a coupla years but listen to a separate satellite radio exclusively now anyway - which is noise free.
I suspect that it is a ground problem, which has been suggested here previously but after cleaning up any ground I can find, no joy! Have decided not to drive myself to distraction over it and, as I say, I simply listen to the satellite radio - which has much better programming and is continent wide. Seeing as I'm not particularly interested in using the CB it is no loss!