My wife hates my hobby but.....she actually took the time to find something I do not own for my bow. It is called a MeanV string suppressor. She actually took my bow to a friend and he ordered one for her to give to me. I swear you could have knocked me over with a feather. Anyway I take it to the local shop to get some thread put on my string and I am told by all the "experts" that it does nothing for my bow because I already have string suppressors on it. I have a Mathews Drenalin. I install it anyway and guess what. It reduced vibration and noise a LOT. It lowered my shot noise by several decibals according to the equipment in the science lab where a friend works. Damn cool and the owner even called me back twice to answer some questions.

BTW I am not a salesman or receive any compensation for sales related to posting this product.
http://www.meanvarchery.com/googlef2423a5cfff7c50c.html