KERTO-RIPA FOCUS ON ACOUSTIC Acoustic quality becomes a major challenge for terraced houses or apartments. The results from the World Health Organization (WHO) “Lares” Survey about European housing carried out in 2002-2003 show that neighbour noise is a health problem. R'w - Weighted Apparent Sound Reduction Index - a single number rating of airborne sound insulation between rooms, over a range of frequencies - field measurement. L'nT,w - Weighted Standardized Impact Sound Pressure Level - single number quantity used to characterize the Impact Sound Insulation of floors, based on on-site measurement of L'nT REQUIRED AIRBORNE SOUND INSULATION BETWEEN DWELLINGS DnT,w - Weighted Standardized Level Difference REQUIRED IMPACT SOUND INSULATION BETWEEN DWELLINGS As Finland requires one of the highest level in Europe… …our Kerto-Ripa elements are based on the highest requirements ! Data from Birgit Rasmussen, SBi Danish Building Institute, Aalborg University. Published in Applied Acoustics, no° 71-2010 with the title „Sound insulation between dwellings – Requirements in building regulations in Europe‟, pages 373-385. (study carried and verified out in 2008)
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