Acoustic classification with the descriptor of the weighted standardized level difference DnT,w with use of the weighted apparent sound reduction index R'w

Buildings must ensure sound insulation appropriate to their use. This sound insulation is regulated by building regulations. In many Europe countries this is by use of the weighted apparent sound reduction index R'w or the weighted standardized level difference DnT,w. This paper shows that a direct assignment of the quantities R'w and DnT,w is only possible for certain geometric ratios of room volume and separating area (V/S). If a permissible deviation between R'w and DnT,w is accepted, a classification of the sound insulation values (R'w) with fixed class limits can be made. This makes it possible to classify the sound insulation with reference to the descriptive parameter DnT,w using the weighted apparent sound reduction index R'w.