S12/WG 23

Determination of Sound Power

Chair: Bennett Brooks

Scope: Develop and maintain standards for the determination of sound power based on sound pressure or sound intensity, or that use sound power to determine sound immission. Review sound power test codes submitted to S12 under the canvass method; to review and coordinate and liaison with other S12 Working Groups that deal with sound power; to review documents dealing with sound power submitted to ANSI under the public review process.

Responsible for the following published standards:

• ANSI/ASA S12.5-2006 / ISO 6926: Acoustics – Requirements for the Performance and Calibration of Reference Sound Sources Used for the Determination of Sound Power Levels
• ANSI/ASA S12.50 / ISO 3740: Acoustics – Determination of sound power levels of noise sources – Guidelines for the use of basic standards
• ANSI/ASA S12.51 / ISO 3741: Acoustics – Determination of sound power levels and sound energy levels of noise sources using sound pressure – Precision methods for reverberation test rooms
• ANSI/ASA S12.53, Part 1 / ISO 3743-1: Acoustics – Determination of sound power levels and sound energy levels of noise sources using sound pressure- Engineering methods for small, movable sources in reverberant fields – Part 1: Comparison method for a hard-walled test room
• ANSI/ASA S12.53, Part 2 / ISO 3743-2: Acoustics – Determination of Sound Power Levels of Noise Sources – Engineering Methods for Small, Movable Sources in Reverberant Fields – Part 2: Methods for Special Reverberation Test Rooms
• ANSI/ASA S12.54 / ISO 3744: Acoustics – Determination of sound power levels and sound energy levels of noise sources using sound pressure – Engineering methods for  an essentially free field over a reflecting plane
• ANSI/ASA S12.55 / ISO 3745: Acoustics – Determination of sound power levels and sound energy levels of noise sources using sound pressure – Precision methods for anechoic rooms and hemi-anechoic rooms
• ANSI/ASA S12.55 / Amd. 1 / ISO 3745 / Amd 1: Acoustics – Determination of sound power levels and sound energy levels of noise sources using sound pressure – Precision methods for anechoic rooms and hemi-anechoic rooms – Amendment 1
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• ANSI/ASA S12.56 / ISO 3746: Acoustics – Determination of sound power levels and sound energy levels of noise sources using sound pressure – Survey method using an enveloping measurement surface over a reflecting plane
• ANSI/ASA S12.57 / ISO 3747: Acoustics – Determination of sound power levels of noise sources using sound pressure – Engineering/survey methods for use in situ in a reverberant environment
• ANSI/ASA S12.58: Sound Power Level Determination for Sources Using a Single-Source Position

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