职业性耳蜗神经炎的发生率随噪声强度的增加而上升。在容许标准85dB A时其发生率约5％。为此作者提出85dB A噪声做为容许极限是否合理的问题。作者共观察两组工人,第一组530人在95dB A噪声环境下工作,第二组585人在85dBA噪声环境下工作;工龄分为1～9年10～14年及15年以上三个时期。聋的程度以轻度、中度及重度三个等级表示。为对职业耳蜗神经炎早期诊断及损伤部位进行研究,另在两组中观察80名工人(160只耳)对声强辨别阈及高频(12～16KHz)辨别阈进行测定。结果发现在95dB A噪声环境下工作的工人发生职业性重听者达15.8％,在85dB A噪声环境下 The incidence of occupational cochlear neuritis increases with increasing noise intensity. Occurs when the standard 85dB A is allowed to about 5%. To this end the author put 85dB A noise as a tolerance limit is reasonable. The authors observed a total of two groups of workers, the first group of 530 people working in a 95dB A noise environment, the second group of 585 people working in a 85dBA noise environment; working age is 1 to 9 years 10 to 14 and 15 years over three periods . The degree of deafness is expressed in three levels of mild, moderate and severe. In order to study the early diagnosis of cochlear neuritis and the site of injury, another 80 workers (160 ears) were observed in the two groups to determine the discrimination threshold of the sound intensity and the discrimination threshold of the high frequency (12 ~ 16KHz). As a result, it was found that 15.8% of the occupational heavy listeners were working in the 95dB A noisy environment. In the 85dB A noisy environment