Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Range of sound pressure level of spoken
announcements
Annex A (normative) - Method for measuring the
sound pressure level of spoken announcements
and ambient noise
Annex B (informative) - Effects of age-related hearing
loss on word recognition
Annex C (informative) - Examples of measurement condition
and result records
Annex D (informative) - STI method to determine minimum
speech level
Bibliography