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SRPS EN ISO 7235:2010

Acoustics - Laboratory measurement procedures for ducted silencers and air-terminal units - Insertion loss, flow noise and total pressure loss (ISO 7235:2003)

Oct 26, 2010

General information

60.60     Oct 26, 2010

ISS

Z043

European Norm

91.120.20  

English  

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Scope

ISO 7235:2003 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, andthe 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 ISO 7235:2003 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.
ISO 7235:2003 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.
It is not applicable to reactive silencers used for motor vehicles.

Related directives

NOTE: If the word "harmonized" (marked in green) is not found in the field with the name of the directive, it means that the European standard is not cited in the OJEU.

2006/42/EC

Directive 2006/42/EC of the European Parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast)

Harmonized
98/37/EC

Machinery

Life cycle

NOW

PUBLISHED
SRPS EN ISO 7235:2010
60.60 Standard published
Oct 26, 2010

REVISED BY

PROJECT
prSRPS EN ISO 7235:2025

Related project

Adopted from EN ISO 7235:2009

Adopted from ISO 7235:2003

National regulations and standards

"Сл. гласник РС", бр. 22/17 "Сл. гласник РС", бр. 22/2017
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