I just purchased the: Kobalt Quiet Tech 1-HP 4.3-Gallon 125-PSI 120-Volt Twin Stack Portable Electric Air Compressor
I can't imagine having a regular air compressor going on and off in an enclosed room, they are so loud. This Kobalt Quiet Tech is around 60 decibels, about 1/2 as loud as a regular air compressor. It works great!
I also just bought the kobalt quiet tech because I'm working in such a small area I didn't want a loud one. It's perfect, great size, not loud at all, has wheels for portability and can work for anything else around the house if needed!