I've owned/shot lots of old Bear bows over the years. Never used anything but dacron on them, haven't experienced that kind of problem.
I match the strand count to the draw weight (a way over-built string can cause some noise, especially dacron) and use "cat whisker" silencers. I start with a "naked" string (no silencers) and at the low point of the brace. Work up a little at a time to find the sweet spot, where noise and vibration are the least (having someone standing close to listen is a big help). Then tie the silencers on AROUND the string so they can be adjusted--a half-inch can make a big difference with some bows. Same routine--shoot, adjust, shoot some more. You'll find the silencers also have a sweet spot. Don't leave them too long, else they will make their own noise.
If the nocks fit too tight, that will add noise. If your release is sloppy, that will add noise. If your arrow spine is off, that can add noise. Lots of variables to consider. A little tinkering can go a long way.
Chad