ISO 3740:1980 Acoustics; Determination of sound power levels of noise sources; Guidelines for the use of basic standards and for the preparation of noise test codes
2019ISO 3740:2019 Acoustics — Determination of sound power levels of noise sources — Guidelines for the use of basic standards
2000ISO 3740:2000 Acoustics - Determination of sound power levels of noise sources - Guidelines for the use basic standards
1980ISO 3740:1980 Acoustics; Determination of sound power levels of noise sources; Guidelines for the use of basic standards and for the preparation of noise test codes