ÖNORM EN ISO 140-3

This part of IS0 140 specifies a laboratory method of measuring the airborne sound insulation of building elements such as walls, floors, doors, windows, faCade elements and faGades, except those classified as small building elements (for which a measuring method is specified in IS0 140-101)). The results obtained can be used to design building elements with appropriate acoustic properties, to compare the sound insulation properties of building elements and to classify such elements according to their sound insulation capabilities. The measurements are performed in laboratory test facilities in which transmission of sound on flanking paths is suppressed. Results of measurements made in accordance with this part of IS0 140 therefore shall not be applied directly in the field without accounting for other factors affecting sound insulation, especially fianking transmission and loss factor.