BS EN IEC 60268-16:2020 PDF

Sound system equipment - Objective rating of speech intelligibility by speech transmission index

First page of standard BS EN IEC 60268-16:2020

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Title (English):

BS EN IEC 60268-16:2020

Sound system equipment - Objective rating of speech intelligibility by speech transmission index

Document status:: Active
Format:: Electronic (PDF)
Publication date:: August 31, 2025
ICS:: 33.160.01
Technical committee:: CENELEC
SKU:: BS EN IEC 60268-16:2020

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Abstract

1 Scope This part of IEC 60268 defines the STI model, test signals, measurement and prediction methods. The objective of this document is to provide a comprehensive manual for all types of users of the STI model in the fields of audio, communications and acoustics. This document does not provide STI criteria for certification of transmission channels (e.g. criteria for a voice-alarm system), but some typical application values are provided in Annex G. Every measurement method has limitations, and the reader is referred to clauses relating to limitations such as speech privacy, echo and systems using digital voice compression (vocoders). This document does not cover the case of fluctuating noise on the STI, although some general comments on dealing with this complex issue are provided in 7.13 and 8.9.3.

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BS EN IEC 60268-16:2020 PDF

Abstract

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Abstract

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