I have the exact same issue, sounds like the re-verb is way to high in the stations ambient. I would equate this sound to having your head in a Tesla coil, this has been going on for quite a long time now and needs to be fixed. Just to see how badly this was effecting my speakers I popped one the grills off and the speaker is vibrating like mad! This has the potential of damaging my equipment. Cryptic needs to address/fix this issue. This sound problem only seems to be present in the outer ring area / promenade of DS9.
I am using creative 7.1 surround speakers
Realtek Alc888 sound board with driver version 184.108.40.20626