I always loved the look of natural silencers like beaver, muskrat, or wool on my trad bows but Ron is right...... Cat whiskers are the, "Cat's Pajamas " on our Shrews.
I have shot and listened to lots of other carbon bows and to me a lot of them have a high pitched, "tink " when shot. May not be louder than a non carbon bow, just a different pitch sound but definitely not a sound I or a deer would like.......
The carbon foam Shrews do not have this sound or pitch that I can hear. Our Shrew CH's are the quietest bows on our wall.......