Originally Posted by Maxxthrasher
If you can move the compressor away from your painting area, that would be the first thing. If that doesn't help or your not able to, you can build a box, or housing for your compressor that will help reduce the noise. If you can do both, you'll have solved your problem.
Don't build a housing for a compressor! It will make the unit heat up causing excessive condensation in the air being supplied to the airbrush and it will decrease the usable life span of the compressor.