Dang Wei-Min, Wang Sheng, Tian Shi-Xiu, Zhao Quan-Hong, Chen Bing, Sun Fei, He Li-Hua, Zou Zhi-Fang, Guo Zhi-Bin, Ma Wen-Jun
The Institute of Mental Health, Peking University, 100083 Beijing, China.
Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi. 2008 Dec;26(12):711-4.
To study the characteristics of infrasound and its effects on the workers at power plants.
The audible noise and infrasound in three thermoelectricity plants were measured and by using Symptom Checklist 90 (SCL-90), the subjective sensation, and the physiological indices were compared between exposed workers and controls.
The infrasound levels were different at different measure sites of the three thermoelectricity works ranging from 40 to 98 dB. There was still 40 approximately 80 dB infrasound even when the soot blower stopped running. Different apparatus produced different infrasound levels with the highest ranging from 62 to 115 dB. A single frequency (16 Hz) infrasound was produced in certain department during working hour with sound pressure levels of 110 to 120 dB, but the audible noise sound pressure level was less than 70 dB. There was no significant difference in the indices representing vision fatigue and neurobehaviour function between exposed workers and controls. Workers at certain department experienced evident subjective sensation of neurobehavioral dysfunction, and the scores of somatization, depression, hostility, phobic anxiety, and psychotism in the SCL-90 were significantly higher in the exposed group than in the control and the norm in China (P < 0.05).
Infrasound is ubiquitous in the working environment, but usually, the noise levels are less than 120 dB. In some special production department, there is persistent infrasound above 110 to 120 dB. No obvious health effects are found among those who are exposed to infrasound below 100 dB. However, the workers who are chronically exposed to infrasound above 110 to 120 dB present notable subjective sensation of autonomic neurobehavioral dysfunction, and their psychological health status is not as good as those in the control and those in the domestic normal pattern.
研究次声特性及其对发电厂工人的影响。
对三家热电厂的可听噪声和次声进行测量，并使用症状自评量表90（SCL - 90），比较暴露工人与对照组的主观感受及生理指标。
三家热电厂不同测量点的次声水平不同，范围为40至98分贝。即使吹灰器停止运行，仍存在约40至80分贝的次声。不同设备产生的次声水平不同，最高可达62至115分贝。在工作时间，某部门会产生单一频率（16赫兹）的次声，声压级为110至120分贝，但可听噪声声压级小于70分贝。暴露工人与对照组在代表视觉疲劳和神经行为功能的指标上无显著差异。某部门的工人有明显的神经行为功能障碍主观感受，暴露组在SCL - 90中的躯体化、抑郁、敌对、恐惧焦虑和精神病性得分显著高于对照组及中国常模（P < 0.05）。
次声在工作环境中普遍存在，但通常噪声水平低于120分贝。在一些特殊生产部门，存在持续高于110至120分贝的次声。暴露于低于100分贝次声的人群未发现明显健康影响。然而，长期暴露于高于110至120分贝次声的工人存在明显的自主神经行为功能障碍主观感受，其心理健康状况不如对照组及国内正常水平。
