Normal speech can be overheard - 25Rw dB
Loud speech can be heard clearly - 30Rw dB
Loud speech can be distinguished in normal conditions - 35Rw dB
Loud speech can be heard but not distinguished - 40Rw dB
Loud speech can be heard faintly but not distinguished - 45Rw dB
Loud speech can only be heard with great difficulty - 50Rw dB
10mm Toughened Glass - 36Rw dB
10.8mm Acoustic Glass - 38Rw dB
12mm Toughened Glass - 36Rw dB
12.8mm Acoustic Laminated Glass - 40Rw dB
16.8mm Acoustic Laminated Glass - 42Rw dB
6mm Toughened Glass - 32Rw dB
6.4mm Laminated Glass - 33Rw dB
10mm Toughened Glass - 35Rw dB
10.8mm Acoustic Glass - 38Rw dB
12mm Toughened Glass - 36Rw dB
12.8mm Acoustic Glass - 40Rw dB
10mm + 10mm Toughened + Toughened Glass - 45Rw dB
12mm + 12mm Toughened + Toughened Glass - 45Rw dB
10mm + 12.8mm Toughened + Acoustic Laminated Glass - 46Rw dB
12mm + 12.8mm Toughened + Acoustic Laminated Glass - 47Rw dB
10.8mm + 12.8mm Acoustic Laminated + Acoustic Laminated Glass - 51Rw dB