ISO 3745:2012/Amd 1:2017

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ISO 3745:2012/Amd 1:2017 is an international standard for determining sound power levels and sound energy levels of noise sources using sound pressure. It specifies a precise method for use in anechoic and hemi-anechoic rooms, which are environments designed to minimize sound reflections. The "Amd 1" indicates that it is an amendment to the original standard published in 2012, meaning it includes modifications or updates to the original document.