The requirements on constructional sound insulation of door sets consisting of door blank, frame and sealings are classified into different types of use according to DIN 4109 (German Standard).
The sound insulation tests are performed in test facilities which are free of leakage, i. e. the sound is only transmitted by the door and not by other elements as walls, ceilings or gaps.
The result is taken according to German Standard DIN 52210 in Rw = ‘sound insulation level in dB without sound transmission by flanking building components’.