Norm

NEN-EN-ISO 11691:2009 en

Akoestiek - Meting van de tussenschakelverzwakking van geluiddempers in kanalen zonder stroming - Globale laboratoriummethode

34,42

Over deze norm

Status Definitief
Aantal pagina's 6
Commissie Akoestiek
Gepubliceerd op 01-09-2009
Taal Engels
This International Standard specifies a laboratory substitution method to determine the insertion loss without flow of ducted, mainly absorbent, circular and rectangular silencers, as well as other duct elements for use in ventilating and air-conditioning systems. This International Standard is applicable to silencers where the design velocity does not exceed 15 m/s. As the method does not include self-generated flow noise, this International Standard is not suitable for tests on silencers where this type of noise is of great importance for the evaluation of the silencer performance. The insertion loss determined according to this International Standard in a laboratory will not necessarily be the same as the insertion loss that will be obtained in an installation in the field. Different sound and flow fields in the duct will yield different results. As this International Standard requires regular test ducts, the results may include some flanking transmission via structural vibrations in the duct walls, that sets an upper limit to the insertion loss that can be determined.

Details

ICS-code 91.120.20
Nederlandse titel Akoestiek - Meting van de tussenschakelverzwakking van geluiddempers in kanalen zonder stroming - Globale laboratoriummethode
Engelse titel Acoustics - Measurement of insertion loss of ducted silencers without flow - Laboratory survey method
Vervangt
Normatieve verwijzingen
  • 98/37/EG, Machines

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