EN 61669:2016

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Test setup diagrams
5 Limitations
6 Test equipment
7 Test conditions
8 Measurements
9 Measurement uncertainty for the performance
  requirements of Clause 6
Annex A (informative) - Positioning the probe microphone
        sound inlet at the measurement point
Annex B (informative) - Issues in RECD measurement and
        application
Annex C (informative) - Relationship between tolerance
        interval, corresponding acceptance interval and the
        maximum permitted uncertainty of measurement
Bibliography
Annex ZA (normative) - Normative references to
         international publications with their
         corresponding European publications

IEC 61669:2015 gives recommendations and requirements for the measurement and estimation of the real-ear acoustical performance characteristics of air-conduction hearing aids and for the measurement of certain acoustic properties of the ear related to the application of hearing aids. Measurements of real-ear acoustical characteristics of hearing aids which apply non-linear or analytical processing techniques are valid only for the test signals used and conditions employed. The purpose of this standard is to ensure that measurements of real-ear acoustical performance characteristics of a given hearing aid on a given human ear can be replicated in other locations with other test equipment. This second edition cancels and replaces the first edition of IEC 61669:2001 and the first edition of ISO 12124:2001. This edition constitutes a technical revision.