Reciprocating internal combustion engines - Measurement method for exhaust silencers - Sound power level of exhaust noise and insertion loss using sound pressure and power loss ratio
Edition 2025-09

BS ISO 20145 Pneumatic fluid power - Test methods for measuring acoustic emission pressure levels of exhaust silencers
Edition 2025-06-18

BS ISO 15619 Reciprocating internal combustion engines - Measurement method for exhaust silencers - Sound power level of exhaust noise and insertion loss using sound pressure and power loss ratio
Edition 2025-01-06

Reciprocating internal combustion engines. Measurement method for exhaust silencers. Sound power level of exhaust noise and insertion loss using sound pressure and power loss ratio
Edition 2013-09-30

Pneumatic fluid power. Test methods for measuring acoustic emission pressure levels of exhaust silencers
Edition 2019-10-28

Acoustics - Laboratory measurement procedures for ducted silencers and air-terminal units - Insertion loss, flow noise and total pressure loss (ISO 7235:2003)
Edition 2010-03-03

Acoustics - Measurement of insertion loss of ducted silencers without flow - Laboratory survey method (ISO 11691:2020)
Edition 2021-10-13

ACOUSTICS. MEASUREMENTS ON SILENCERS IN SITU (ISO 11820:1996).
Edition 1997-06-24

ACOUSTICS - GUIDELINES FOR NOISE CONTROL BY SILENCERS (ISO 14163:1998)
Edition 1999-09-30

Chimneys - Accessories - Part 1: Chimney silencers - Requirements and test methods
Edition 2021-06-30