Ah yes, good old soundproofing101! In my previous life, I was planning to convert my garage into a recording studio.
I'm *hoping* what I'm doing is going to be sufficient. If it's not, I'll end up having to do something like risilient channels and another layer of drywall. I'm thinking I should be O.K. though.
If the shop is too loud I'll just stick some big speakers out front and blast music. That way the neighbors won't hear the machinery.