ICS 17.140.01. Zmiana do Normy Europejskiej EN ISO 3745:2012/A1:2017 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 (ISO 3745:2012/Amd1:2017) ma status Zmiany do Polskiej Normy.