EN ISO 7029:2017

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Specification
Annex A (informative) - Selected values of the
        Gaussian distribution
Annex B (informative) - Numerical example to
        illustrate the procedure
Annex C (informative) - Median values of expected
        hearing threshold deviations
Annex D (informative) - Selected values of the
        statistical distribution of hearing threshold
        deviations
Annex E (informative) - Expected median thresholds
        at audiometric frequencies from 9000 Hz to
        12500 Hz
Annex F (informative) - Notes on the derivation of
        descriptive statistics of hearing thresholds
Annex G (informative) - Dispersion of source data
        around the expected median of hearing thresholds
Bibliography

ISO 7029:2017 provides descriptive statistics of the hearing threshold deviation for populations of otologically normal persons of various ages under monaural earphone listening conditions. It specifies the following, for populations within the age limits from 18 years to 80 years for the range of audiometric frequencies from 125 Hz to 8 000 Hz:a) the expected median value of hearing thresholds given relative to the median hearing threshold at the age of 18 years;b) the expected statistical distribution above and below the median value.For the frequencies from 3 000 Hz to 8 000 Hz, the median and statistical distribution for populations above 70 years are presented for information only.ISO 7029:2017 also provides for information the expected median values at audiometric frequencies from 9 000 Hz to 12 500 Hz within the age limits from 22 years to 80 years.