DIN EN ISO 3745 : 2017 Title: 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 (ISO 3745:2012 + Amd 1:2017) (includes Amendment :2017) Year: 2017 Publisher: DIN Media GmbH Availability: Within 1-2 working days