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.
Tämän julkaisun valmistelusta Suomessa vastaa Metalliteollisuuden Standardisointiyhdistys ry, puh. 09 19 231 (vaihde).
Sisällysluettelo
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 Speaker and listener characteristics (normative)
Annex B Subjective speech-intelligibility tests (informative)
Annex C Speech transmission index, STI (informative)
Annex D Overview of the means of communication and related parameters (informative)
Annex E Speech interference level, SIL (normative)
Annex F Intelligibility ratings for speech communications (informative)
Annex G Definition of symbols (normative)
Annex H Examples of applications of predictive intelligibility methods (informative)