Building a Quiet Box for an air compressor

[@comfort_in_discomfort]

Remember, dB is a logarithmic scale. So 2dB reduction is great. If you add more mass to the walls, you'll have better performance (like double/triple the drywall). I'm about to do this myself.

[@mikesbrokenacres]

Absolutely! And if you build it as two walls, isolated as much as possible from each other, and offset the studs between walls you can reduce it much farther!