LST EN 61265-2001 Electroacoustics. Instruments for measurement of aircraft noise. Performance requirements for systems to measure one-third-octave band sound pressure levels in noise certification of transport-category aeroplanes (IEC 61265:1995)
2001LST EN 61265-2001 Electroacoustics. Instruments for measurement of aircraft noise. Performance requirements for systems to measure one-third-octave band sound pressure levels in noise certification of transport-category aeroplanes (IEC 61265:1995)