Grzesik J, Pluta E
Int Arch Occup Environ Health. 1986;57(2):127-36. doi: 10.1007/BF00381380.
Based on audiometric tests in the range of 10 to 20 kHz, of 106 ultrasound operators, as well as on measurements of high-frequency noise, the problem of safety limits for high-frequency noise exposure was investigated. Analyzing the relation between noise levels of 1/3 octave bands at center frequencies of 10, 12.5 and 16 kHz and the accumulated noise dose on the one hand, and changes of hearing at 10 to 12, 11 to 13 and 14 to 16 kHz respectively, on the other hand, a harmless level up to 80 dB and a harmless noise dose up to 1 unit for people not older than 40 years have been found. For older people this level and this noise dose can be dangerous.
基于对106名超声操作员在10至20千赫兹范围内的听力测试以及高频噪声测量，对高频噪声暴露的安全限值问题进行了研究。一方面分析中心频率为10千赫、12.5千赫和16千赫的1/3倍频程带噪声水平与累积噪声剂量之间的关系，另一方面分析分别在10至12千赫、11至13千赫和14至16千赫的听力变化，发现40岁及以下人群的无害水平高达80分贝，无害噪声剂量高达1单位。对于老年人来说，这个水平和这个噪声剂量可能是危险的。
