STUDY ON VERIFYING TECHNOLOGY OF RMS DETECTOR CHARACTERISTICS OF SOUND LEVEL METERS

Current standards have defined the methods to verify the rms (root-mea n-square) detector characteristic of sound level meters. When using th ese methods, there will be a systematic error in the measuring results . The results then cannot accurately express the error in the rms dete ctor characteristic of a sound level meter. The reason for this is tha t the effect of the difference between the frequency-weighting charact eristics of the sound level meter to be inspected and that of the stan dard system is ignored. So, an erroneous judgment may be made. Aiming at this problem, this paper contains some theoretical analysis and qua ntitative calculation in detail. An improved verifying method is put f orward. (C) 1998 Acoustical Society of America. [S0001-4966(98)00311-7 ]