Leakage through ceiling

Hi I have just moved into a new studio space & have a problem with sound leakage through the ceiling into the room above. This was not unexpected but I am trying to work out the best approach to reduce the leakage. I primarily do film sound design & of course low frequencies from my subwoofer wreak havoc with the tenants above. The structure of the building is solid concrete (ie the walls & ceiling beams) but the ceiling/their floor is basically wooden floor boards + an air gap + one layer of jib board on my ceiling. So no surprise my bass is passing straight through. The owner of the building has suggested installing a floating false ceiling with a rubber sound curtain lieing on top of it. As I understand it, this wont stop low frequencies & I think I would be better off to first add another layer of jibboard, then dense sound insulation & THEN suspend a false ceiling... What would your advice be? thanks in advance tim

pic shown- Is this kind of right? I would fill the rafters with an additional 1-2 layers of plasterboard. then insul wool. Maybe finish it of with RC and plasterboard or layers of plasterboard-greenglue-plasterboard?

The owner of the building has suggested installing a floating false ceiling with a rubber sound curtain lieing on top of it. As I understand it, this wont stop low frequencies & I think I would be better off to first add another layer of jibboard, then dense sound insulation & THEN suspend a false ceiling... What would your advice be?

That MIGHT be right, if you do it the way Lilith said. In other words, the "another layer of jibboard" (I guess you mean "gypsum board?) goes up tight against the floor above, no air gap at al between it and the floor, and you seal it in place with caulk. It must be airtight. Then you stuff in ordinary mineral wool or fiberglass insulation below that, as thick as you can afford to make it. Then you put resilient channel across underneath the joists, then you attach two layers of 5/8 sheetrock, (also called gypsum board, drywall, plaster board, etc) to the resilient channel. Caulk and seal everything air tight. That will help quite a bit to stop sound getting through. Forget the typical "acoustic ceiling" ("false ceiling") that you see in many modern offices: that's not much use for your application. And forget the "rubber sound curtain". He is probably talking about mass loaded vinyl or rubber. That stuff is expensive, and will only give you the same result as one extra layer of sheetrock. sheetrock is MUCH cheaper. Also, make sure that you do NOT have THREE layers of material between your room and the room upstairs. If you do that, you will get WORSE isolation in the low frequencies. you wont only TWO layers. You can build up each layer from several sheets of material, but when you are done you must have ONE composite layer, then the air gap that is full of mineral wool, then another composite layer. This is called "two leaf" construction, and is the only way to get good isolation at reasonable cost. - Stuart -