SN EN 60268-16 : 2003

1 Scope
2 Normative references
3 Definitions and abbreviations
4 Descriptions of the methods
    4.1 General
    4.2 The STI method
    4.3 The STITEL method
    4.4 The STIPA method
    4.5 The RASTI method
    4.6 Methods of measurement
5 Methods of determining intelligibility
    5.1 Word tests
    5.2 Modified rhyme tests
    5.3 Speech intelligibility Index
    5.4 Articulation loss of consonants
Annex A (normative) Speech transmission index (STI) and
                    revised (STI[r]) methods
                A.1 Background
                A.2 The STI method
                A.3 The test signals
Annex B (informative) The STITEL method
Annex C (informative) The STIPA method
Annex D (informative) THe RASTI method
Annex E (informative) Qualification of the STI and relation
                      with some subjective intelligibility
                      measures
Annex ZA (normative) Normative references to international
                     publications with their corresponding
                     European publications
Bibliography
Figures
Tables

States objective methods for rating the transmission quality of speech with respect to intelligibility. The four methods are referred to as the "STI", the "STITEL", the "STIPA" and the "RASTI" methods. The methods are intended for rating speech transmission with or without sound systems.