Also look into an anti-static air gun. This sends ions out with the air and greatly increases the effectiveness. One of these should allow you to work at lower pressure, hence less noise. Not cheap, but spending hours with the cloning tool and having angry neighbors aren't cheap, either. One example (I have no idea of the technology today- search around) http://kinetronics.com/store/iag.html
I have something similar, and I agree with Dan..... I can use less pressure, usually below 5 psi, and get better results with the ionizer.
I haven't decided on how to proceed. Once my last few compressed air cans are done, I suppose it will be time to order one. These guys contacted me about a quiet model that they demonstrate in a video: http://www.youtube.com/user/gmcpowerequipment
Though it sounds like I don't need 116psi which seems to be their lowest power one.