SS-EN-ISO-7235 › Historical Revision Information
Acoustics - Laboratory measurement procedures for ducted silencers and air-terminal units - Insertion loss, flow noise and total pressure loss (ISO 7235:2003)
Document Center Inc. is an authorized dealer of SIS standards.
The following bibliographic material is provided to assist you with your purchasing decision:
The following bibliographic material is provided to assist you with your purchasing decision:
This International Standard specifies methods for determining - the insertion loss, in frequency bands, of ducted silencers with and without airflow, - the sound power level, in frequency bands, of the flow noise (or regenerated sound) generated by ducted silencers, - the total pressure loss of silencers with airflow, and - the transmission loss, in frequency bands, of air-terminal units. The measurement procedures are intended for laboratory measurements at ambient temperature. Measurements on silencers in situ are specified in ISO 11820. It is to be noted that the results determined in a laboratory according to this International Standard will not necessarily be the same as those obtained in situ (installation), as different sound and flow fields will yield different results. For example, the pressure loss will be lower under laboratory conditions than in situ, but will be comparable between different laboratories. This International Standard is applicable to all types of silencer including silencers for ventilating and air-conditioning systems, air intake and exhaust of flue gases, and similar applications. Other passive air-handling devices, such as bends, air-terminal units or T-connectors, can also be tested using this International Standard. This International Standard is not applicable to reactive silencers used for motor vehicles.
To find similar documents by classification:
Machinery. Revised Machinery Directive
This document comes with our free Notification Service, good for the life of the document.
This document is available in either Paper or PDF format.
Designation Name
SS-EN ISO 7235:2009
Revision Level
2009 EDITION
Status
Current
Publication Date
Aug. 17, 2009
Language(s)
English
Page Count
64
International Equivalent
EN ISO 7235:2009(IDT); ISO 7235:2003(IDT)