NF EN 61252 : 1995 AMD 2 2017

Committees responsible
National foreword
Introduction
Specification
1 Scope
2 Normative references
3 Definitions
4 General performance requirements
5 Reference conditions
6 Absolute acoustical sensitivity
7 Frequency weighting
8 Linearity of response to steady signals
9 Response to short-duration signals
10 Response to unipolar pulses
11 Latching overload indicator
12 Sensitivity to various environments
13 Instrument marking
14 Instruction manual
Annexes
A (informative) Sound exposures and corresponding
     normalized 8-h-average sound levels
B (informative) Recommended tests to verify the
     performance of a personal sound exposure meter
Tables
1 Design-goal A-frequency weighting relative to
     response at 1 kHz and the tolerances delta A that
     apply to the performance of a complete personal
     sound exposure meter
A.1 Sound exposures and corresponding normalized 8-h-
     average sound levels
B.1 Minimum set of target conditions for 1 kHz steady-
     signal linearity tests
B.2 Conditions for testing response to short-duration
     signals
Figure
1 Functional elements of a personal sound exposure
     meter

Specifies acoustical and electrical performance requirements for personal sound exposure meters of one accuracy grade. Applies to instruments for measurement of A-frequency-weighted sound exposure resulting from steady, intermittent, fluctuating, irregular or impulsive sounds. Coverage includes: latching overload indicator; sensitivity to various environments; response to unipolar pulses; linearity of response to steady signals. Also includes detailed definitions, annexes and tables.