ANSI S12.34 : 0被替代
ENGINEERING METHODS FOR THE DETERMINATION OF SOUND POWER LEVELS OF NOISE SOURCES FOR ESSENTIALLY FREE-FIELD CONDITIONS OVER A REFLECTING PLANE
出版：Acoustical Society of America
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基本信息
标准编号： ANSI S12.34 : 0
标准类别：Standard
出版单位：Acoustical Society of America
标准页数：0
标准简介
Describes engineering procedures to measure sound pressure levels for calculation of octave or one-third octave band and A-weighted sound power levels. Deals with the specification of the basic acoustical requirements for the measurement of noise under free field conditions over a reflecting plane. Coverage includes: the microphone and its associated cable, frequency response of the instrumentation system; weighting network, frequency analyser; calculation of surface sound pressure level; directivity index and directivity factor.
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