世界衛生組織(WHO)1997公布的聽力損失程度分級標準(根據500,1000,2000及4000Hz氣導平均閾值計算:

聽力損失程度                                                 聽覺閾值(dBHL)

輕度                                                                                26--40

中度                                                                                 41--60

重度                                                                                61--80

極重度                                                                              81以上