Standard test method for evaluating masking sound in open offices using a - weighted and one - third octave band sound pressure levels 用a加權和1 3倍頻帶聲壓級評價敞開式辦公間掩蔽聲的標準試驗方法
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 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 - thirs - octave band sound pressure levels in noise certification of transport - category aeroplanes 電聲學.航空噪聲測量儀.運輸機噪聲檢定的三分之一倍頻帶聲壓級系統(tǒng)測量用性能要求
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 aeroplanes 電聲學.航空噪聲測量儀器.在運輸機噪聲鑒定中測量三分之一帶寬倍頻聲壓級裝置的性能要求