Originally Posted by craig john
I disagree. A dropped ceiling, (that doesn't rattle), with open floor joists above, and fiberglass stuffed in between the floor joists, makes a big acoustic cloud/bass trap. Reflections off a hard ceiling are far more damaging than absorption into an acoustic ceiling.
+1,000,001! I've been a professional installer since '86. Yes, acoustical ceilings CAN be fraught with problems but they can also be some of THE best applications for sound. There is a reason they are called 'acoustic'.
Less than professional or , more properly, commercial grid systems intalled by a regular Joe raises the likelihood that you may have problems. Take out some tiles & knock on the grid. You will know immediately if the wires supporting the grid are loose. Thats a problem. Look around the perimeter/wall angle to assure it is installed snug & secure to the wall. If there's hvac or the like above the ceiling then it, too could well be a source of noise. Putting a hard lid under that would just make it impossible to access at all & the problem will still be there. I have seen & installed many high high end home theatre ceiling applications & they are very fine for sound. There are things to do to improve the sound/noise. And they are cheap.