Grzesik J, Pluta E
Int Arch Occup Environ Health. 1983;53(1):77-88. doi: 10.1007/BF00406179.
Sound and ultrasound emitted by industrial ultrasonic (Uls) devices exceed the known proposed hygienic limits, especially for frequencies 10-20 kHz. The consequence of this may be a negative influence of this energy on the auditory function in the high-frequency hearing range. To determine the hearing risk to Uls operators, an adequate method for testing the hearing threshold from 10-20 kHz has been developed. In order to get reference values, 189 non-exposed persons were tested. On this basis, the hearing thresholds of 55 operators for frequencies 500-20,000 Hz were evaluated. In addition to threshold elevations in the range 10-20 kHz, a decreasing number of subjects responding to stimuli at the highest audible frequencies was observed. The threshold shift at 10-20 kHz of subjects exposed to sound and ultrasound emitted by Uls-devices depends upon the physical parameters of the sound spectrum, time on the job and daily exposure time. No abnormalities were found in the hearing range 500-8000 Hz.
工业超声（Uls）设备发出的声音和超声波超过了已知的建议卫生限值，尤其是在10 - 20千赫兹的频率范围内。这可能会对高频听力范围内的听觉功能产生负面影响。为了确定Uls设备操作人员的听力风险，已经开发出一种用于测试10 - 20千赫兹听力阈值的适当方法。为了获取参考值，对189名未接触者进行了测试。在此基础上，评估了55名操作人员在500 - 20,000赫兹频率范围内的听力阈值。除了在10 - 20千赫兹范围内的阈值升高外，还观察到在最高可听频率下对刺激有反应的受试者数量减少。暴露于Uls设备发出的声音和超声波的受试者在10 - 20千赫兹处的阈值偏移取决于声谱的物理参数、工作时间和每日暴露时间。在500 - 8000赫兹的听力范围内未发现异常。
