IEC 60268-16:2011
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Sound system equipment - Part 16: Objective rating of speech intelligibility by speech transmission index
Hardcopy , PDF
English, English - French
28-06-2011
31-12-2021
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Description of the STI method
5 Direct method of measuring STI
6 Indirect method of measuring STI using the impulse
response
7 Measurement procedures, post-processing of data
and applications
8 Use of STI as a design prediction tool
Annex A (normative) - Speech transmission index
(STI) and revised STI methods
Annex B (normative) - STIPA method
Annex C (normative) - STITEL method
Annex D (informative) - RASTI method (obsolete)
Annex E (informative) - Qualification of the STI and
relationships with other speech intelligibility
measures
Annex F (informative) - Nominal qualification bands for STI
Annex G (informative) - Examples of STI qualification bands
and typical applications
Annex H (informative) - Non-native listeners
Annex I (informative) - Effect of age-related hearing loss
and hearing impairment on speech intelligibility
Annex J (normative) - Calibration of STI test signal level
Annex K (informative) - Example test report sheet for STI
measurements
Annex L (normative) - Prediction of STI using statistical
methods
Annex M (informative) - Adjustments to measured STI
and STIPA results for simulation of occupancy
noise and different speech levels
Annex N (informative) - Other methods of determining
speech intelligibility
Bibliography
IEC 60268-16:2011 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. This fourth edition cancels and replaces the third edition, published in 2003, and constitutes a technical revision. It includes the following significant technical changes with respect to the previous edition:
- development of more comprehensive, complete and unambiguous standardization of the STI methodology;
- the term STIr is discontinued. A new function for the prediction of auditory masking effects is introduced;
- the concept of 'speech level' and the setting of the level of the test signal have been introduced;
- additional information has been included on prediction and measurement procedures. The French version of this standard has not been voted upon.
| Committee |
TC 100/TA 20
|
| DevelopmentNote |
Supersedes IEC 60089. (07/2004) Stability Date: 2017. (09/2017)
|
| DocumentType |
Standard
|
| Pages |
71
|
| PublisherName |
International Electrotechnical Committee
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
| Standards | Relationship |
| DIN EN 60268-16:2012-05 | Identical |
| NBN EN 60268-16 : 2011 | Identical |
| NEN EN IEC 60268-16 : 2011 | Identical |
| I.S. EN 60268-16:2011 | Identical |
| PN EN 60268-16 : 2011 | Identical |
| CEI EN 60268-16 : 2012 | Identical |
| EN 60268-16:2011 | Identical |
| NF EN 60268-16 : 2015 | Identical |
| BS EN 60268-16:2011 | Identical |
| UNE-EN 60268-16:2004 | Identical |
| UNE-EN 60268-16:2011 | Identical |
| UNE-EN IEC 60268-16:2020 | Identical |
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