Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
4 Requirements for speech recognition test material
5 Evaluation of speech recognition test
6 Reporting of speech signal level
7 Contralateral masking noise level
8 Ambient sound pressure levels in test room for speech
audiometry
9 Sound field speech audiometry
10 Preparation and instruction of test subject
11 Subject's response mode
12 Determination of speech detection threshold level
13 Determination of speech recognition threshold level
14 Determination of speech recognition scores
15 Contralateral masking
16 Speech recognition with competing sound
17 Format of speech audiogram
18 Measurement uncertainty
19 Maintenance and calibration of equipment
Annex A (informative) - Example of speech materials
Annex B (informative) - Examples of competing sound
conditions
Annex C (informative) - Typical results
Annex D (informative) - Optimisation of perceptual
equivalence of test lists
Annex E (informative) - Measurement uncertainty
Annex F (informative) - Reference equivalent threshold
sound pressure levels for speech recognition for
specific earphones
Annex G (informative) - Derivation and application of
the speech sound pressure levels
Annex H (informative) - Correction figures for free-field
equivalent output for certain types of earphones
Bibliography