CEI EN 60645-2 : 1997

FOREWORD
INTRODUCTION
1. Scope and object
2. Normative references
3. Definitions
4. General requirements
5. Minimum requirements for specific types of audiometers
6. Reference conditions for specification, testing and calibration
    Of speech audiometers
7. Signal level indicator
8. Output level control for speech signals
9. Output sound-pressure level and vibratory force level
10. Frequency response
11. Harmonic distortion
12. Signal-to-noise ratio
13. Masking sound
14. Monitor earphone or loudspeaker
15. Talkback system
16. Interrupter switches
17. Marking and instruction manual
Annex A (Informative) - correction figures for free
                        field equivalent output for certain types
                        of commonly used earphones
ANNEX ZA (Normative) - normative references
                       to international publications
                       with their corresponding
                       european publications

Describes the requirements for audiometers or parts thereof designed to provide a means of presenting speech sounds to a subject in a standardized manner, for example for the measurement of speech recognition.