DIN 45643-2:1984 Measurement and assessment of aircraft noise; aircraft noise monitoring systems within the meaning of article 19a of the Luftverkehrsgesetz (Civil Aviation Law)
2011DIN 45643:2011 Measurement and assessment of aircraft sound; Text in German and English
1984DIN 45643-2:1984 Measurement and assessment of aircraft noise; aircraft noise monitoring systems within the meaning of article 19a of the Luftverkehrsgesetz (Civil Aviation Law)