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NEN-EN-IEC 60268-16

Sound system equipment - Part 16: Objective rating of speech intelligibility by speech transmission index

active, Most Current
Organization: NEN
Publication Date: 1 December 2020
Status: active
Page Count: 232
ICS Code (Audio, video and audiovisual systems in general): 33.160.01
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.

Document History

NEN-EN-IEC 60268-16
December 1, 2020
Sound system equipment - Part 16: Objective rating of speech intelligibility by speech transmission index
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...
NEN-EN-IEC 60268-16
September 1, 2011
Sound system equipment - Part 16: Objective rating of speech intelligibility by speech transmission index
This part of IEC 60268 specifies objective methods for rating the transmission quality of speech with respect to intelligibility. The objective of this standard is to provide a comprehensive manual...
NEN-EN-IEC 60268-16
September 1, 2003
Sound system equipment - Part 16: Objective rating of speech intelligibility by speech transmission index
Defines objective methods for rating thetransmission quality of speech with respect to intelligibility. The four methods which are closely related, are referred to as the "STI", the "STITEL", the...
NEN-EN-IEC 60268-16
May 1, 1998
Sound system equipment - Part 16: Objective rating of speech intelligibility by speech transmission index
Concerns objective methods for rating the transmission quality of speech with respect to intelligibility. The three methods, which are closely related to as the "STI", the "STITEL" and the "RASTI"...

References

This document references:
ANSI/ASA S12.2 - American National Standard Criteria for Evaluating Room Noise
Published by ASA on May 21, 2019
The three primary methods for evaluating room noise are: 1. The survey method that employs the A-weighted sound level; 2. The engineering method that employs noise criteria (NC) curves; and 3. The...
This document references:
ANSI/ASA S3.5 - American National Standard Methods for Calculation of the Speech Intelligibility Index
Published by ASA on June 6, 1997
The predictions of this Standard apply to listening conditions where the input variables of the Speech Intelligibility Index (Sll) model can be accurately estimated. The input variables include the...
This document references:
IEC 60268-3 - Sound system equipment – Part 3: Amplifiers
Published by IEC on April 1, 2018
This part of IEC 60268 applies to analogue amplifiers, and the analogue parts of analogue/digital amplifiers, which form part of a sound system for professional or household applications. It...
This document references:
IEC 60318-1 - Electroacoustics – Simulators of human head and ear – Part 1: Ear simulator for the measurement of supra-aural and circumaural earphones
Published by IEC on August 1, 2009
This International Standard relates to the specification of an ear simulator which covers the frequency band 20 Hz to 10 000 Hz and is intended for calibrating supra-aural earphones used in...
This document references:
IEC 60118-4 - Electroacoustics – Hearing aids – Part 4: Induction-loop systems for hearing aid purposes – System performance requirements
Published by IEC on November 1, 2017
This part of IEC 60118 is applicable to audio-frequency induction-loop systems producing an alternating magnetic field at audio frequencies and intended to provide an input signal for hearing aids...
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