EN ISO 8253-3:2012

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements for recording of speech material
5 Validation of speech material recordings
6 Requirements for speech audiometry
7 Ambient sound pressure levels in test room for
   speech audiometry
8 Sound field speech audiometry
9 Preparation and instruction of test subject
10 Subject's response mode
11 Determination of speech detection threshold level
12 Determination of speech recognition threshold level
13 Determination of speech recognition scores
14 Contralateral masking
15 Speech audiometry with competing sound
16 Format of speech audiogram
17 Measurement uncertainty
18 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) - Optimization of perceptual balance
        of test lists
Annex E (informative) - Measurement uncertainty
Bibliography

ISO 8253-3:2012 specifies basic methods for speech recognition tests for audiological applications.In order to ensure minimum requirements of precision and comparability between different test procedures including speech recognition tests in different languages, ISO 8253-3:2012 specifies requirements for the composition, validation and evaluation of speech test materials, and the realization of speech recognition tests. ISO 8253-3:2012 does not specify the contents of the speech material because of the variety of languages.Furthermore, ISO 8253-3:2012 also specifies the determination of reference values and fulfilment requirements for the realization and manner of presentation.ISO 8253-3:2012 specifies procedures and requirements for speech audiometry with the recorded test material being presented by air conduction through an earphone, or from a loudspeaker for sound field audiometry. Methods for using noise either for masking the non-test ear or as a competing sound are described.Some test subjects, for example children, can require amended test procedures not specified in ISO 8253-3:2012.Specialized tests such as those used for evaluating directional hearing and dichotic hearing are outside the scope of ISO 8253-3:2012.