- A - Timber stud partition
- B - Steel Stud Partition
- C - Lined Brickwork
- D - Twin framed wall
- E - Timber floor & ceiling
- F - Concrete floor & ceiling
- G - Block wall & linings
- H - Glazing
- I - Impact on concrete floor
- J - Impact on timber floor
A - Timber stud partition
- - - - Predicted Rw 40 dB
------ Measured Rw 42 dB
1 layer of 10mm sound rated plasterboard each side of 90mm timber studs. Fibreglass in cavity.
B - Steel Stud Partition
- - - - Predicted Rw 42 dB
------ Measured Rw 43 dB
2 layers of 13mm type X plasterboard each side of 90mm steel studs. Blanket in cavity.
C - Lined Brickwork
- - - - Predicted Rw 49 dB
------ Measured Rw 51 dB
Clay brick (90mm thick) with 1 layer of 16mm plasterboard fixed to acoustic clip and 25mm fibreglass blanket in cavity.
D - Twin framed wall
- - - - Predicted Rw 57 dB
------ Measured Rw 59 dB
1 layer of 16mm fire rated plasterboard each side of separate 90mm studs. Cavity depth of 200mm. 90mm fibreglass blanket in cavity (16kg/m3).
E - Timber floor & ceiling
20mm Particleboard flooring on 300mm timber joists with 2 layers of 16mm Fire rated plasterboard hung on a light steel grid underneath, with fibreglass blanket in the joist cavity
F - Concrete floor & ceiling
- - - - Predicted Rw 57 dB
------ Measured Rw 59 dB
Composite concrete steel floor (Hibond) 120mm thick with suspended light steel grid with 2 layers of 13mm fire rated plasterboard. 75mm fibreglass blanket in the cavity.
G - Block wall & linings
- - - - Predicted Rw 59 dB
------ Measured Rw 60 dB
190mm concrete block lined both sides with 16mm fire rated gypsum board fixed to 75mm steel Z furring channels. No sound absorber in the cavity
H - Glazing
- - - - Predicted Rw 39 dB
------ Measured Rw 40 dB
5mm monolithic glass with 16mm airgap and 8.8mm Laminated glass
I - Impact on concrete floor
- - - - Predicted Ln,w 29 dB
------ Measured Ln,w 27 dB
150mm concrete slab
J - Impact on timber floor
- - - - Predicted IIC 34 (Ln,w 76 dB)
------ Measured IIC 37 (Ln,w 73 dB)
15mm thick OSB subfloor on 235mm timber joists at 406mm oc with resilient channels at 610mm oc with 16mm gypsum board.