What is ISO 15186-2 - Field measurements of sound insulation in buildings about?
ISO 15186-2 is the second part of the multiple series document that specifies a sound intensity method to determine the in-situ sound insulation of walls, floors, doors, windows and small building elements. ISO 15186-2 is intended for measurements that have to be made in the presence of flanking transmission. ISO 15186-2 can be used to provide sound power data for diagnostic analysis of flanking transmission or to measure flanking sound insulation parameters. Also, ISO 15186-2 describes the effect of flanking transmission on measurements made using the specified method.
Note: ISO 15186-2 can be used by laboratories that could not satisfy the requirements of ISO 15186-1, which deals with laboratory measurements with no or little flanking transmission. ISO 15186-3 deals with measurements under laboratory conditions, at low frequencies.
Who is ISO 15186-2 - Field measurements of sound insulation in buildings for?
ISO 15186-2 on measurement of sound insulation in buildings and of building elements using sound intensity is useful for:
- Acousticians 
- Acoustical engineers 
- Agencies of acoustic environment testing 
- People qualifying for free-field environments 
Why should you use ISO 15186-2 - Field measurements of sound insulation in buildings?
Normal sound intensity is composed of the sound intensity, in watts per square metre, in the direction normal to a measurement surface defined by the unit normal vector.
ISO 15186-2 specifies instrumentation, test arrangement, test procedure, expression of results, and test report for measurement of sound insulation in buildings. This method gives values for airborne sound insulation, which are frequency dependent. Also, ISO 15186-2 describes the effect of flanking transmission on measurements made using the specified method, and how intensity measurements are used:
- To compare the in-situ sound insulation of a building element with laboratory measurements where flanking has been suppressed (i.e. ISO 140-3)
- To rank the partial contributions for building elements
- To measure the flanking sound reduction index for one or more transmission paths (for validation of prediction models such as those given in EN 12354-1)
Overall, ISO 15186-2 helps you to improve the quality of products and services in buildings.
