BS EN 60651:1994

Foreword
1 Scope
2 Object and general requirements
3 Definitions
4 General characteristics
5 Directional characteristics of the microphone and
    instrument case
6 Frequency weighting and amplifier characteristics
7 Detector and indicator characteristics
8 Sensitivity to various environments
9 Calibration and verification of the basic characteristics
    of the sound level meter
10 Provision for use with auxiliary equipment
11 Rating information and instruction manual
12 Electromagnetic and electrostatic compatibility
     requirements and test procedures
Appendices
A Tests of the overload and detection characteristics
B Diffuse field sensitivity
C Theoretical response to tone bursts
D (normative) Equations for design-goal frequency
                weightings
E (informative) Emission limits
ZA Other international publications quoted in this
    standard with the references of the relevant
    European publications
NA (informative) Committees responsible

Describes instruments (sound level meters) for the measurement of certain frequency and time weighted sound pressure levels. Gives the following characteristics of sound level meters: - directional characteristics; - frequency weighting characteristics; - time weighting, detector and indicator characteristics; - sensitivity to various environments.

Specifies requirements for sound level meters with respect to their immunity to power- and radio-frequency fields and to electrostatic discharge, and the permitted radio-frequency emissions, together with test procedures to demonstrate conformance to the specifications of this standard.