Reciprocating internal combustion engines. Measurement method for exhaust silencers. Sound power level of exhaust noise and insertion loss using sound pressure and power loss ratio1 Scope 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

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the Commission Delegated Directive EU 2015/863 amending Annex II to Directive 2011/65/EU [10] and 2000/53/EC (ELV) [2]