IEC 60268-16 Ed. 5.0 b:2020

IEC 60268-16 Ed. 5.0 b:2020 Sound system equipment - Part 16: Objective rating of speech intelligibility by speech transmission index

standard by International Electrotechnical Commission, 09/25/2020

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IEC 60268-16:2020 specifies objective methods for rating the transmission quality of speech with respect to intelligibility. It provides a comprehensive manual for all types of users of the STI method in the fields of audio, communications and acoustics. Three methods are presented, which are closely related and are referred to as STI, STIPA, and STITEL. The first two methods are intended for rating speech transmission performance with or without sound systems. The STITEL method has more restricted uses.