RO
SR EN ISO 15186-3:2011
Acoustics - Measurement of sound insulation in buildings and of building elements using sound intensity - Part 3: Laboratory measurements at low frequencies (ISO 15186-3:2002)
ISO 15186-3:2002 specifies a sound intensity method to determine the sound reduction index and the element-normalized level difference of building elements at low frequencies. This method has significantly better reproducibility in a typical test facility than those of ISO 140-3, ISO 140-10 and ISO 15186-1. The results are more independent of the room dimensions of the laboratory and closer to values that would be measured between rooms of volume greater than 300 m3. ISO 15186-3 is applicable in the frequency range 50 Hz to 160 Hz but is mainly intended for the frequency range 50 Hz to 80 Hz. NOTE For elements faced with thick, porous absorbers, the recommended frequency range is 50 Hz to 80 Hz. The main differences between the methods of ISO 15186-1 and ISO 15186-3 are that in ISO 15186-3 the sound pressure level of the source room is measured close to the surface of the test specimen, and the surface opposite the test specimen in the receiving room is highly absorbing and converts the room acoustically into a duct with several propagating cross-modes above the lowest cut-on
Status :
Valid
Approval date : 2/28/2011
Number of pages : 22
ICS : 91.120.20 acoustics in building.Sound insulation
Technical Committee : 276 - Building acoustics
- Normative reference SR EN ISO 10140-2:2011
- Normative reference SR EN 61043:2003
- Normative reference SR EN ISO 140-3:2002
- Normative reference SR EN ISO 10140-4:2011
- Normative reference SR EN ISO 10140-3:2011
- Normative reference SR EN ISO 10140-1:2011
- Normative reference SR EN ISO 10140-1:2011/A1:2012
- Normative reference SR EN ISO 9614-1:2001
- Normative reference SR EN ISO 10140-1:2011/A2:2014
- Normative reference SR EN 60942:2004