I would think about lowering the draw weight also. I would have bad dreams about my bow exploding in my face. The arrows sound like they may be undersplined.
Another thing to check is what it sounds like to other people next to you. I always felt that my bow was loud but others said that it was pretty quiet. I had my friend shoot it and found that it was pretty quiet so I stopped trying to put all kinds of junk on it. I don't even have string silencers on it now. Just limbsavers and a stabilizer.