The difficulty in building a sound proofed ceiling is mounting sufficient mass horizontally.
The brute force solution is to lay concrete on top of metal shuttering, preferably as a double-leaf construction.
The concrete could be up to 175 mm thick in total. As always, mass wins.
For a less heavily engineered solution, the BBC recommend woodwool slabs.
Woodwool is a sheet or board made from a mixture of thin strips of wood and cement, which are bound together through compression within a mould.
Layers of plasterboard can be used too, providing they are adequately supported.
'Acoustic tiles' are virtually useless as sound insulation, although they do find application in acoustic treatment.Come on the FREE COURSE TOUR