BS EN 61265:1995
電聲學.航空噪聲測量.運輸機噪聲檢定測量三分之一帶寬倍頻聲壓級裝置性能要求
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 aircraft