On 28-Aug-2004, "Allen S." wrote:

One thing with using the drywall screws is that I'm just
creating a more solid connection to the vibration source and that could make
things worse not better...i think you're right that isolation / dampening
may be the way to go...

That's right. In dealing with vibration isolation, the key things are to
reduce the stiffness of the connection, increase the mass of the thing
vibrating or increase the damping. Increasing the damping is actually
harder than it sounds. Getting the equipment on a soft mount is the
best first step. Increasing the mass of the ceiling is also possible -
adding sand as someone suggested. However, that isn't going to affect
the damping as another poster assumed.

If you can't change the mounting of the equipment, you could hang the
ceiling from resilient channel supports.

Mike