The compressor is a 4- cylinder, it runs at a fairly low rpm, and is not that loud, and it doesnt come on too often with the 80 gallon tank. BUT my previous compressor was one of those small "oilless" ones, and if youve ever heard one of those, anything sounds quiet compared to that. The tile walls are 4x8 sheets of tileboard, and they dont seem to reflect the noise, main reason for that tile is easy cleanup in that area. thanks for the kind words
Dan