ANSI S12.34-1988 (R1997)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
专家解读视频
基本信息
标准编号： ANSI S12.34-1988 (R1997)
标准类别：Standard
出版单位：Acoustical Society of America
标准页数：40
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.
标准备注
Revision of ANSI S1.34-1980
本标准替代的旧标准
替代本标准的新标准
