ISO 15619

Description / Abstract: This International Standard specifies the measurement method and requirements for exhaust silencers which is installed on reciprocating internal combustion engines, including laboratory measurement and site measurement.

The following parameters are measured for laboratory measurement (engineering method):

— the sound power level (A-weighted or in frequency bands) of exhaust noise using sound pressure, accuracy grade 2;

— the insertion loss (A-weighted or in frequency bands) of exhaust silencers;

— the power loss ratio of reciprocating internal combustion engines.

The following parameters are measured for site measurement and laboratory measurement (survey method):

— the sound power level (A-weighted) of exhaust noise using sound pressure, accuracy grade 3;

— the insertion loss (A-weighted) of exhaust silencers.

NOTE 1 The aim of laboratory measurement in measuring the sound power level of exhaust noise is accuracy grade 2 (engineering method) result. When the correction for background noise and/or the environment conditions and/or the location of exhaust outlets cannot meet the requirements of the engineering method of this International Standard, then accuracy grade 3 (survey method) result is obtained. The aim of site measurement in measuring the sound power level of exhaust noise in this International Standard is accuracy grade 3 (survey method) result.

The laboratory measurement (engineering method) of this International Standard can be used to make acceptance tests and engineering measures. The site measurement and laboratory measurement (survey method) of this International Standard can be used to make comparative tests.

This International Standard applies to all exhaust silencers installed on reciprocating internal combustion engines falling within the field of application of ISO 3046‑1 and other exhaust silencers, if no suitable International Standard exists.

NOTE 2 Throughout the text, exhaust silencer is referred to as silencer and reciprocating internal combustion engine as engine.