是一个带有普遍性的问题。关于它的诊断标准和防护标准及其测试规范,世界各国有的已经制定,有的正在制定,我国也正在研制中。此项标准各国不同,美国各州亦不尽相同;一个国家制定标准后也常进行修订。不过各国标准当局多愈益倾向于接受ISO推荐的标准,特别是在测试技术方面。在计算耳聋等级时,应用Fletcher指数,即以500、1000和2000赫语言频率听阈级的算术均值为指标,将耳聋分为轻度(26～)、中度(41～)、重度(56～)、严重度(71～)和极度(91～),则几乎是普遍接受的原则。但职业性噪声聋在语言频率的均值通常多达不到“重度”水平,而从听力防护角度看,重要的是高频听区——3000～6000赫频带部分的听力损失,在诊断中必须强调高频听力下降 It is a universal problem. About its diagnostic criteria and protection standards and test specifications, some countries in the world have made, some are making, and our country is also under development. This standard varies from country to country and from state to state in the United States. A country often makes amendments after setting standards. However, national standards authorities are more and more inclined to accept the ISO recommended standards, especially in test technology. In the calculation of deafness, the Fletcher index was used to divide the deafness into mild (26 ~), moderate (41 ~) and severe (56 ~ ), Severity (71 ~), and extreme (91 ~) are almost universally accepted principles. However, the average frequency of occupational noise deafness in the language is usually less than the “heavy” level, and from the perspective of hearing protection, it is important that high-frequency listening area - 3000-6000 hertz band hearing loss, the diagnosis must Emphasis on high-frequency hearing loss