Re: drum shield
As already noted, only about 2 feet of concrete can significantly reduce low-frequency soundwaves. For studio settings, you need something pretty beefy like a full-on ClearSonic enclosure with all the bells and whistles. For live settings (especially small venues), low-end sound is not the real issue; it's all the high-frequency clutter that creates the loud and muddy mess that musicians hate. For your garage setup you could probably just stack haybales around your kit - as long as you don't mind setting up a housing development for rodents in your garage. In all seriousness, haybales would probably be pretty effective; they have an R40 insulation rate for heat and cold, and that translates into sound insulation as well. For your garage, aesthetics wouldn't be a big issue; you'd just want to moisture proof them if you live in a humid area.
Last edited by plastickman; 06-18-2013 at 10:54 PM.