BS EN ISO 140-3:1995 Acoustics. Measurement of sound insulation in buildings and of building elements - Laboratory measurement of airborne sound insulation of building elements
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This part of ISO 140 specifies a laboratory method of measuring the airborne sound insulation of building elements such as walls, floors, doors, windows, façade elements and façades, except those classified as small building elements (for which a measuring method is specified in ISO 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 ISO 140 therefore shall not be applied directly in the field without accounting for other factors affecting sound insulation, especially flanking transmission and loss factor.
BS EN ISO 140-3:1995 Acoustics. Measurement of sound insulation in buildings and of building elements - Laboratory measurement of airborne sound insulation of building elements