5000正常耳的纯音听阈观察

近年来观察了１２年间门诊就诊的５０００正常耳的纯音听力图。其结果显示正常耳的纯音听阈与标准听力零级相比，各频率均有不同程度的提高，表明正常人纯音听阈的提高可能是社会群体与生活在城市、社区、交通噪声、厂矿及音乐等噪声环境有关，而导致正常纯音听阈的提高。

Pure tone threshold in 5000 normal ears

Pure tone audiogram of 5000 normal ears were examined in out patient department in the past ten years.The result showed that pure tone threshold of normal ears in every frequency lifted to some extent.This result may be related to living environment(noise from traffic,factory,loud music,etc).