DS/EN ISO 11691:2009
Acoustics - Measurement of insertion loss of ducted silencers without flow - Laboratory survey method

Standard No.

DS/EN ISO 11691:2009

Release Date

2009

Published By

Danish Standards Foundation

Status

Be replaced 2020-12

Replace By

DS/EN ISO 11691:2020

Latest

DS/EN ISO 11691:2020

Replace

DS/EN ISO 11691:1996

Scope

1.1 GeneralThis 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.NOTE 1 Laboratory measurement procedures for ducted silencers with superimposed flow are described in IS0 7235.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 fo

DS/EN ISO 11691:2009 history

• 2020 DS/EN ISO 11691:2020 Acoustics – Measurement of insertion loss of ducted silencers without flow – Laboratory survey method (ISO 11691:2020)
• 2009 DS/EN ISO 11691:2009 Acoustics - Measurement of insertion loss of ducted silencers without flow - Laboratory survey method
• 0000 DS/EN ISO 11691:1996