EN ISO 3740: Determination of Sound Power Level

The standard EN ISO 3740, published in march 2019, replaces the previous version EN ISO 3740:2002. 

This standard gives the guidelinees for the use and selection of a set of international standards regarding differen methods for determining sound power levels from all type of machinery, equipment and products.

The guidelinees described in this standard are applied to airborne sound.

The standards taken into consideration from EN ISO 3740 are: 

• ISO/TS 7849-1,-2: “Determination of airborne sound power levels emitted by machinery using vibrations measurements”
• ISO 3741: “Determination of sound power levels and source energy levels of noise sources using sound pressure – Precision methods for reverberation test rooms”
• ISO 3743: “Determination of sound power levels and source energy levels of noise sources using sound pressure – Engineering methods for small movable sources in reverberant fields”
• ISO 3744: “Determination of sound power levels and source energy levels of noise sources using sound pressure – Engineering methods for an essentially free field over a reflecting plane”
• ISO 3745: “Determination of sound power levels and source energy levels of noise sources using sound pressure – Precision methods for anechoic and semi-anechoic rooms”
• ISO 3746: “Determination of sound power levels and source energy levels of noise sources using sound pressure – Survey method using an enveloping measurements surface over a reflecting plane”
• ISO 3747: “Determination of sound power levels and source energy levels of noise sources using sound pressure – Engineering/survey methods for use in situ in a reverberant environment”
• ISO 9614-1,-3: “Determination of sound power levels of noise sources using sound intensity”