Report "I have a ingersoll rand P1IU-A9 how would i be able to reduce the output noise of the compressor for indoor use i would love to reduce it down to 80db one of my thoughts was dynamat on the back for the front dial guage that sheet metal is pretty thin and that should reduce about 90% of the rattle. my other question is im a bridge painting contractor and i have sound dampening material for a project we did in philadelphia, i was also thinking about building a box lined with this material to muffle the sound i just wouldnt know on how to make the box so it would still be able to breath. if you can help in anyway i would greatly appreciate. thank you, paul dovas"