EN 352-7:2002

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
5 Testing
6 Information supplied by the manufacturer
7 Marking
Annex A (informative) Uncertainty of measurement and
        interpretation of test results
Annex B (informative) Determination of criterion level
        for level-dependent ear-plugs
Annex ZA (informative) Clauses of this European standard
         addressing essential requirements or other
         provisions of EU Directive
Bibliography

This European Standard is concerned with level-dependent ear-plugs. It specifies additional constructional, design and performance requirements, methods of test, marking requirements and user information relating to the incorporation of the level-dependency facility. The requirements of this standard are intended to take account of the ergonomic interaction between the wearer, the device and where possible the working environment in which the device is likely to be used (see Annex ZA, of this standard and EN 458).