ISO 7029:2017提供了不同年龄的耳科正常人在单耳耳机听力条件下的听阈偏差的描述性统计数据。对于18岁至80岁年龄范围内的人群，在125 Hz至8000 Hz的测听频率范围内，它规定了以下内容: a） 相对于18岁时的平均听阈，给出的预期听阈中值； b） 高于和低于中值的预期统计分布。 对于3000 Hz至8000 Hz的频率，70岁以上人口的中值和统计分布仅供参考。 ISO 7029:2017还提供了22岁至80岁年龄范围内9 000 Hz至12 500 Hz测听频率的预期中值信息。

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.