Its all a scam so start stealing
As opposed to acoustic treatment , which is what you do on the inside of your studio..... I'lll explain in pictures as we build, how to soundproof a place. I'll also tell ya what materials you need to keep your beats inside teh studio rather than annoy ya neighbors. Its not cheap, but it ain't as expensive as you might think, and well if you just want to reduce teh sound, you can reduce the number of skins of plasterboard you'll need......