ANSI/ASA S1.4 PART 1 : 2014

1 Scope
2 Normative references
3 Terms and definitions
4 Reference environmental conditions
5 Performance specifications
6 Environmental, electrostatic, and radio-frequency
  requirements
7 Provision for use with auxiliary devices
8 Marking
9 Instruction Manual
Annex A (informative) - Relationship between tolerance
        interval, corresponding acceptance interval and the
        maximum-permitted uncertainty of measurement
Annex B (normative) - Maximum-permitted uncertainties
        of measurement
Annex C (informative) - Example assessments of conformance
        to specifications of this standard
Annex D (normative) - Frequencies at fractional-octave intervals
Annex E (normative) - Analytical expressions for
        frequency-weightings C, A, and Z
Annex F (informative) - Additional information for U.S. users
        regarding low-frequency tolerances in this standard vs.
        previous versions of ANSI S1.4

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; and -an integrating sound level meter that measures frequency-weighted sound exposure levels.