EN ISO 7235:1995

Acoustics - Measurement procedures for ducted silencers - Insertion loss, flow noise and total pressure loss (ISO 7235:1991) EN ISO 7235:1995

Publication date:   Sep 1, 2002

General information

99.60 Withdrawal effective   Aug 1, 2003

CEN

CEN/TC 211 Acoustics

European Norm

17.140.99   Other standards related to acoustics

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Scope

This International Standard specifies the substitution method for determining the insertion loss of ducted silencers. It sets out requirements for determining: - the insertion loss, in frequency bands, of silencers with and without air flow; - the sound power level, in frequency bands, of the flow noise generated by silencers; - the total pressure loss of silencers with air flow. The measurement procedures are intended for laboratory measurements on silencers but may also be used for in situ measurements on silencers if the requirements of this International Standard can be met. This International Standard applies to silencers for ventilating air-conditioning systems which are usually connected to ducts or splitter absorbers mounted in ducts. Other duct elements, such as bends or T-connectors, may also be tested using this Intenational Standard. This International Standard does not apply to reactive silencers used for motor vehicles. [There is a note on the precision of the method]

Related legislation

Legislation related to this standard

98/37/EC

Machinery

Harmonized/Supporting
89/392/EEC

Machinery - Safety of machinery: general essential health and safety requirements

Harmonized/Supporting

Life cycle

NOW

WITHDRAWN
EN ISO 7235:1995
99.60 Withdrawal effective
Aug 1, 2003

REVISED BY

WITHDRAWN
EN ISO 7235:2003

Relations

Adopted from ISO 7235:1991 NOT_EQUIVALENT