Table 1.
The three load-bearing slabs used in the floor constructions, the number of sound insulation tests available for each slab type, and the ranges of weighted normalized impact SPL, Ln,w, and weighted sound reduction index, Rw.
| Type of load-bearing slab | Thickness [mm] | No. of floors | Ln,w [dB] | Rw [dB] |
|---|---|---|---|---|
| Open box timber slab | 370 | 15 | 39−72 | 49−75 |
| Cross-laminated timber slab (CLT) | 140 | 4 | 50−70 | 38−55 |
| Cross-laminated timber slab (CLT) | 260 | 11 | 24−65 | 42−75 |
| Steel-reinforced concrete slab | 160 | 8 | 35−67 | 49−66 |