So my stealth dresser is 98% complete but my exhaust sounds like an 747 taking off, rendering the stealth not so stealthy. There is currently no charcoal filter on it, but one is on the way. The fans are 115 CFM NMB axial fans. They're on a dimmer but i cant turn them down any more without heat being a problem. I'm thinking of muffling the sound with some sort of muffling material, but haven't done any research on this. Does anyone have any experience controlling this problem? Will the charcoal filter make a big enough difference so that you cant hear the "woosh" of air getting pulled through? Thanks for any advice you guys might have.