CEI EN 61672-1 : 2014

FOREWORD
INTRODUCTION
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 ZA (normative) - Normative
         references to international
         publications with their
         corresponding European
         publications

Describes electroacoustical performance specifications for three kinds of sound measuring instruments: a time-weighting sound level meter that measures exponential-time-weighted, frequencyweighted sound levels, an integrating-averaging sound level meter that measures time-averaged, frequencyweighted sound levels; and, an integrating sound level meter that measures frequency-weighted sound exposure levels.