The Building Regulations Site Test Requirements
Acorn 2003
Airborne sound
Impact sound
Weighted Standard
Level Difference (D'nT,W)
Weighted standardised
Pressure Level (L'nT,w)
52dB (or greater)
61dB (or less)
Tested in accordance with BS2750
Tested in accordance with BS5821
Individual value 48dB
Individual value 65dB