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

Specifies 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.