ÖNORM ISO 9613-2
ÖNORM ISO 9613-2:2008-07-01 "Akustik - Dämpfung des Schalls bei der Ausbreitung im Freien - Teil 2: Allgemeines Berechnungsverfahren (ISO 9613-2:1996)" (Acoustics - Attenuation of sound propagating in open air - Part 2: General calculation method (ISO 9613-2:1996)) was declared binding in the Federal Road Noise Immission Control Ordinance (BStLärmIV), BGBl. II No. 215/2014.
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