I have 3 Shrew CH's. Only one of them is carbon/foam. It is a fantastic bow, but has a higher pitch sound to it that is not as pleasing to my ear. None of the string silencers that I tried resulted in the dead sound that I get with my other two. I accidentally stumbled on something that makes it as silent as the others. I put on Spandex limb protectors (Camo Bow Socks from 3-Rivers Archery). I didn't do it for sound, but rather just to protect the limbs while hunting with it. However, to my surprise they completely deadend the sound and the bow is extremely quiet with them on.