Quiet building

Direct and flanking sound insulation of partitions made of Gypsum Blocks are based on contemporary technology – because they are often used as partitions in residential buildings. They are decoupled from adjacent solid components by using elastic interlayer made of polyethylene closed cell foam or bitumen. Research at the Stuttgart University of Applied Sciences has shown that decoupling influences the direct sound insulation and (depending on the type of the elastic interlayer) can achieve higher sound reduction indices than rigid installations. Compared to rigid installations, it can significantly improve the vibration reduction index of joints particularly. Overall, the flanking sound reduction indices which can be achieved in this way are so high that the flanking transmission via the thin solid walls made of Gypsum Blocks is no longer significant. Values for different configurations for direct and vibration reduction indices which has been derived from test stand measurements and those from buildings were included in the component catalogue of the DIN 4109 (DIN 4109-32 Sound insulation in buildings – Part 32: Data for verification of sound insulation: Solid construction). Based on these data, an acoustic prognosis following the simplified calculation model of DIN EN 12354-1 produces good results