Atlasman:

I had some camo Carbon Express arrows two years ago that seemed quite noisy to draw through the biscuit. Smooth finish carbons, like Easton Axis, are silent. Aluminums are very quiet to my ears. Rougher finish carbons can make a slight hiss.

The sound of the arrow being shot through the bristles is not nearly as bad as the vibration that I get with one of my shoot through rests. With a full, untrimmed B1 biscuit, shooting "soft" vanes like AAE Plastifletch or Duravanes, you can hear a slap. It is not really that loud, and it is something that the shooter hears more than someone standing close by, as I have been in both positions. I don't bother with those types of vanes anymore, as you do have to refletch more often with them. With AAE Speedflytes, Bohnings, and Flex Fletch, the noise, as well as refletching concerns are minimal. I like feathers better than vanes except when it is raining. Feathers make no additional noise when shot through the biscuit.