Soundproofing a studio ceiling

[Nev Australia]

Hi everyone
I'm currently building a studio and cannot stop the sound even from a radio going through the roof into the main bedroom upstairs I'll quickly list what I've down so far
1 Semi rigid 50mm acoustic bates
2 10mm sound board
3 completed no gapped everything in sight
4 stuck pine around all edges and re no gapped
5 then stuck carpet tiles all over the roof

After all this it still goes through
I have hebel brick walls and concrete floor which I'LL CARPET ETC

Any help, advice or persoanl experience would be greatly appreciated I've got no idea what to de next
MANY THANKS
Nev

[detuned6]

Im thinking once theres something on all the walls that will absorb and cut down reflection a little . But i dont think that will solve your problem totally. Try the studio building fourm.