Measurement and assessment of aircraft noise; aircraft noise monitoring systems within the meaning of article 19a of the Luftverkehrsgesetz (Civil Aviation Law)— 6 стр.
Methods of measuring the characteristics of reproducing equipment for digital audio compact discs; (IEC 61096:1992/A1:1996); Amendment A1; German version EN 61096:1993/A1:1996— 10 стр.