American National Standard for Electroacoustics - Sound Level Meters - Part 1: Specifications (a nationally adopted international standard). (Revision of ANSI S1.4-1983 (R2006), ANSI S1.4a-1985 (R2006) and ANSI S1.43-1997 (R2007))
美国电声学国家标准.声级计.第1部分:规范(国家采用的国际标准) (ANSI S1.4-1983(R2006)的修订版 ANSI S1 4a-1985(R2006)和ANSI S1 43-1997(R2007))
This part of ANSI/ASA S1.4 / IEC 61672 gives electroacoustical performance specifications for three kinds of sound-measuring instruments:a time-weighting sound level meter that measures exponential-time-weighted, frequency-weighted sound levels;an integrating-averaging sound level meter that measures time-averaged, frequency -weighted sound levels; andan integrating sound level meter that measures frequency-weighted sound exposure levels.