主观性耳鸣是耳科很常见的症状,不仅在听力减退的病例,而且在没有明显听力减退时也十分多见。其发病率根据美国健康统计组织1968年统计,美国3600万成人患有耳鸣,其中20％(720万)是严重型,到1977年发现在听力减退患者中耳鸣发病率又有显著增加。据报道,在耳科诊所中耳鸣发病率可高达80％,严重的耳鸣有时竟至使病人丧失工作能力的地步。耳鸣发病率虽然很高,但由于它有以下三个特点:(1)它是一种主观症状,缺乏客观检查 Subjective tinnitus is a very common condition in otology, not only in cases of hearing loss, but also in the absence of significant hearing loss. Its incidence rate According to the 1968 statistics of the U.S. Health Statistics Organization, 36 million adults in the United States have tinnitus, of which 20% (7.2 million) are severe. By 1977, there was a marked increase in the incidence of tinnitus in patients with hearing loss. According to reports, the incidence of tinnitus in the otology clinic can be as high as 80%, severe tinnitus sometimes so that patients lose their ability to work. Although the incidence of tinnitus is high, it has the following three characteristics: (1) it is a subjective symptom, and there is a lack of objective examination