This document specifies basic methods for speech recognition tests for audiological applications. NOTE Examples of speech materials are given in Annex A. In order to ensure minimum requirements of precision and comparability between different test procedures including speech recognition tests in different languages, this document specifies requirements for the composition, validation and evaluation of speech test materials, and the realization of speech recognition tests. This document does not specify the contents of the speech material because of the variety of languages. Furthermore, this document also specifies the determination of reference values and requirements for the realization and manner of presentation. In addition, there are features of speech tests described which are important to be specified, but which are not understood as a requirement. This document specifies procedures and requirements for speech audiometry with the recorded test material being presented by an audiometer through a transducer, e.g., an earphone, bone vibrator, or loudspeaker arrangement 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 modified test procedures not specified in this document. Specialized tests, such as those used for evaluating directional hearing and dichotic hearing, are outside the scope of this document.<\/p>\n
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| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | European foreword Endorsement notice <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | Foreword <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | Introduction <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 4 Requirements for recording of speech material 4.1 General requirements 4.2 Calibration signal 4.3 Reference recording <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 4.4 Recording environment 4.5 Recording setup 4.6 Signals and levels 4.6.1 Calibration signals <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 4.6.2 Speech signals 4.6.3 Announcing signals 4.6.4 Competing sound signals 4.7 Phonemic equivalence across test lists 4.8 Perceptual equivalence across test lists <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 5 Validation of speech material recordings 5.1 General 5.2 Determination of reference speech recognition curve <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 5.3 Determination of perceptual equivalence of test lists 5.4 Determination of test-retest reliability 5.5 Documentation <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 6 Requirements for speech audiometry 6.1 Audiometric equipment 6.2 Ambient sound pressure levels in test room for speech audiometry 6.3 Sound field speech audiometry <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 7 Preparation and instruction of test subject 7.1 General 7.2 Preparation of test subject 7.3 Instruction of test subject 8 Subject’s response mode <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 9 Determination of speech detection threshold level <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 10 Determination of speech recognition threshold level <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 11 Determination of speech recognition scores 12 Contralateral masking <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 13 Speech audiometry with competing sound 13.1 Type of competing sound 13.2 Presentation of competing sound 13.3 Speech and competing sound levels <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | 13.4 Test procedure 13.4.1 General 13.4.2 Speech recognition score at fixed SNR 13.4.3 Speech recognition threshold level with a competing sound 14 Format of speech audiogram <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | 15 Measurement uncertainty 16 Maintenance and calibration of equipment 16.1 General 16.2 Stage A: Routine checking and listening tests <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 16.3 Stage B: Periodic electroacoustic tests 16.4 Stage C: Basic calibration tests 16.5 Intervals between tests <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | Annex A (informative) Example of speech materials <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | Annex B (informative) Examples of competing sound <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | Annex C (informative) Typical results <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | Annex D (informative) Optimization of perceptual equivalence of test lists <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | Annex E (informative) Measurement uncertainty <\/td>\n<\/tr>\n | ||||||
| 44<\/td>\n | Annex F (informative) Determination of minimum number of subjects <\/td>\n<\/tr>\n | ||||||
| 46<\/td>\n | Annex G (informative) Determination of test-retest reliability <\/td>\n<\/tr>\n | ||||||
| 51<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Acoustics. Audiometric test methods – Speech audiometry<\/b><\/p>\n |