[hobie1dog]

As been said before in your other thread, they do not have any mass to them. For your needs/wants, it will be a complete waste of time and money.

Let's go back to basics. If have two rooms, one with 120db of music in it. There is a shared wall that you can interchange different materials for the wall. First material is cardboard, which you get 10 db of sound reduction, now down to 110db in the second room. Replace the cardboard with drywall, now you get 30db of reduction, now down to 90db. Now replace the standard 5/8" drywall with 1" thick Quietrock drywall and you get 70db of reduction, which gets you down to 50db in the second room. If you tear it off and put up resilient channel on the wall studs (which will act like a spring and decouple the drywall), then you stop the structure-borne noise, and resilient channel wiil add another 10db of reduction. Put the Quietrock back on and now you only have 40db in your room, plus the bonus of the resilient channel eliminating most of the upstairs units foot traffic noisiest (the structure transferred noise)

Tired of finger pecking all this out. Hope this helps you understand what is necessary to control sound.