Pbb's response was/is an excellent one --should one have/decide on drywall finishing. Your dropped ceiling works like the resilient channels that Pbb spoke of; Use batt insulation (R-12) between the floor joists (along with the dropped ceiling tiles). This is the most economical and effective technique available. De-coupling, spacing and mass is the only way to acheive more effective acoustic isolation (between floors/rooms). Higher density/heavier ceiling tiles (the acoustic-type) is far better than the lighter variety. Although there is some contoversy regarding the density of the insulation (and its effect on sound absorbtion) I would suspect the denser type (Roxall or equivalent) would be the better/more effective insulation.
Bear in mind that duct-work or any other opening between adjacent floors/rooms is a conduit for noise to travel. Practically speaking, adding batt insulation along with denser ceiling tiles provides the best solution for minimizing noise transmission between floors.
peter jasz
Bear in mind that duct-work or any other opening between adjacent floors/rooms is a conduit for noise to travel. Practically speaking, adding batt insulation along with denser ceiling tiles provides the best solution for minimizing noise transmission between floors.
peter jasz