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CEN
EN ISO 9921:2003

EN ISO 9921:2003

Current

Current

The latest, up-to-date edition.

Ergonomics - Assessment of speech communication (ISO 9921:2003)

Published date

15-10-2003

Publisher

Comite Europeen de Normalisation

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Descriptions of speech communications
  4.1 General
  4.2 Speaker
  4.3 Transmission channel
  4.4 Listener
5 Performance of speech communications
  5.1 General
  5.2 Alert and warning situations
  5.3 Person-to-person communications
  5.4 Public address in public areas
  5.5 Personal communication systems
  5.6 Summary of recommended minimum performance
6 Assessment and prediction
  6.1 General
  6.2 Subjective assessment methods
  6.3 Objective assessment and prediction methods
Annex A (normative) Speaker and listener characteristics
Annex B (informative) Subjective speech-intelligibility
                      tests
Annex C (informative) Speech transmission index, STI
Annex D (informative) Overview of the means of
                      communication and related parameters
Annex E (normative) Speech interference level, SIL
Annex F (informative) Intelligibility ratings for
                      speech communications
Annex G (normative) Definition of symbols
Annex H (informative) Examples of applications of
                      predictive intelligibility methods
Bibliography

ISO 9921:2003 specifies the requirements for the performance of speech communication for verbal alert and danger signals, information messages, and speech communication in general. Methods to predict and to assess the performance in practical applications are described and examples are given.

Committee
CEN/TC 122
DocumentType
Standard
PublisherName
Comite Europeen de Normalisation
Status
Current

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IEC 60849:1998 Sound systems for emergency purposes
BS 7827:1996 Code of practice for designing, specifying, maintaining and operating emergency sound systems at sports venues
ISO/TR 4870:1991 Acoustics The construction and calibration of speech intelligibility tests
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ISO 11429:1996 Ergonomics System of auditory and visual danger and information signals
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