Abstract / scope
Specifies a laboratory substitution method to determine the insertion loss of ducted circular and rectangular silencers without flow, as well as other duct elements for use in ventilating and air-conditioning systems.
ISO 11691:1995Withdrawn
Acoustics — Measurement of insertion loss of ducted silencers without flow — Laboratory survey method
Acoustique — Détermination de la perte d'insertion de silencieux en conduit sans écoulement — Méthode de mesurage en laboratoire
This edition has been replaced by ISO 11691:2020.