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About This Item

 

Full Description

This document 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.

All current amendments available at time of purchase are included with the purchase of this document.
 

Document History

  1. BS EN ISO 11691:2020

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    Acoustics. Measurement of insertion loss of ducted silencers without flow. Laboratory survey method

    • Most Recent
  2. BS EN ISO 11691:2009


    Acoustics. Measurement of insertion loss of ducted silencers without flow. Laboratory survey method

    • Historical Version
  3. BS EN ISO 11691:1997


    Acoustics. Measurement of insertion loss of ducted silencers without flow. Laboratory survey method

    • Historical Version