高温和噪声联合作用对钢铁厂工人听力的影响
发布时间：2018-09-07 18:11
【摘要】：目的：调查分析噪声和高温对职业人群永久性听力损伤的联合效应。 方法：选取某钢铁厂接触噪声和高温的工人作为研究对象，采用两因素析因设计的统计学思想进行研究。职工接触噪声水平分为三个层次：小于85dB组、85至91dB组和大于等于91dB组，高温水平也分为三个层次：低温组、中温组和高温组，共计9个组。根据噪声和高温暴露实际情况把职工分入相应的组，每组纳入研究对象30人，共计270人。然后调取纳入分析的270人的2008至2011年听力检测数据进行统计分析。 结果：1、对语频听阈的影响：累计效应达到三年时高温没有表现出协同增强噪声对语频听阈的效应。同时，累计效应达到一年时各高温组间和各噪声组间也没有出现明显语频听阈的差异。累计效应达到达到两年时，各噪声组间出现明显语频听阈的差异，累计效应达到三年时，各高温组间和各噪声组间均出现明显语频听阈的差异。2、对高频听阈的影响：累计效应达两年时高温就表现出协同增强噪声对高频听阈的效应。同时，，累计效应达到一年时各噪声组间出现明显高频听阈的差异。累计效应达到两年和三年时，各高温组间和各噪声组间均出现明显高频听阈的差异。3、对年听阈损失率的影响：高温没有表现出协同增强噪声对年语频听阈损失率的效应，但是高温表现出协同增强噪声对年高频听阈损失率的效应。同时，各高温组间和各噪声组间均出现明显年语频听阈损失率和年高频听阈损失率的差异。 结论：接触高温水平达到一定的级别和一定的年限，高温会在一定程度上对听力产生不良影响。相对语频听阈，高频听阈对温度更敏感。相对高温，噪声对听力的影响更大，特别是对高频听阈的影响。高温表现出协同增强噪声对高频听阈的效应，但是没有表现出协同增强噪声对语频听阈的效应。高温单独对听力一般不会产生明显的影响，高温对听力的影响建立在一定程度噪声暴露的基础之上。
[Abstract]:Objective: to investigate the combined effects of noise and hyperthermia on permanent hearing loss in occupational population. Methods: the workers exposed to noise and high temperature in a steel plant were selected as the research objects, and the two factor factorial design was used to study the statistics. The exposure noise level of workers was divided into three levels: less than 85dB group, to 91dB group and > 91dB group, and high temperature level was divided into three levels: hypothermia group, moderate temperature group and hyperthermia group, a total of 9 groups. According to the actual situation of noise and high temperature exposure, the workers were divided into the corresponding groups, each group included 30 people, a total of 270 people. Then the 2008-2011 hearing test data of 270 people who were included in the analysis were collected for statistical analysis. Results: the cumulative effect of three years of hyperthermia did not show the effect of synergistic enhancement of noise on the threshold of speech frequency. At the same time, there is no significant difference in the speech frequency hearing threshold between the groups and the noise groups when the accumulative effect reaches one year. When the cumulative effect reaches two years, there is a significant difference in the hearing threshold between the noise groups, and when the cumulative effect reaches three years, There was significant difference in the hearing threshold between the two groups. 2. The effect of the accumulative effect on the high frequency hearing threshold: when the accumulative effect reached two years, the synergetic enhancement effect of the noise on the high frequency hearing threshold was shown. At the same time, the accumulative effect reached one year, and there was obvious difference of high frequency hearing threshold among the noise groups. When the accumulative effect reached two years and three years, there was significant difference of high frequency hearing threshold between each high temperature group and each noise group, and the effect on the annual hearing threshold loss rate: the high temperature did not show the effect of synergistic enhancement noise on the loss rate of annual speech frequency threshold. But the high temperature shows the effect of synergistic enhancement noise on the loss rate of annual high frequency hearing threshold. At the same time, there were obvious differences in the loss rate of annual speech frequency threshold and annual high frequency hearing threshold loss between each high temperature group and each noise group. Conclusion: exposure to high temperature to a certain level and a certain number of years, hyperthermia will have a certain degree of adverse effects on hearing. The high frequency hearing threshold is more sensitive to temperature than the speech frequency hearing threshold. Relative to high temperature, noise has more influence on hearing, especially on high frequency hearing threshold. High temperature shows the effect of synergistic enhancement noise on the high frequency hearing threshold, but it does not show the effect of synergetic enhancement noise on the speech frequency hearing threshold. The effect of high temperature on hearing is based on a certain degree of noise exposure.
【学位授予单位】：重庆医科大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：R131
本文编号：2229031
[Abstract]:Objective: to investigate the combined effects of noise and hyperthermia on permanent hearing loss in occupational population. Methods: the workers exposed to noise and high temperature in a steel plant were selected as the research objects, and the two factor factorial design was used to study the statistics. The exposure noise level of workers was divided into three levels: less than 85dB group, to 91dB group and > 91dB group, and high temperature level was divided into three levels: hypothermia group, moderate temperature group and hyperthermia group, a total of 9 groups. According to the actual situation of noise and high temperature exposure, the workers were divided into the corresponding groups, each group included 30 people, a total of 270 people. Then the 2008-2011 hearing test data of 270 people who were included in the analysis were collected for statistical analysis. Results: the cumulative effect of three years of hyperthermia did not show the effect of synergistic enhancement of noise on the threshold of speech frequency. At the same time, there is no significant difference in the speech frequency hearing threshold between the groups and the noise groups when the accumulative effect reaches one year. When the cumulative effect reaches two years, there is a significant difference in the hearing threshold between the noise groups, and when the cumulative effect reaches three years, There was significant difference in the hearing threshold between the two groups. 2. The effect of the accumulative effect on the high frequency hearing threshold: when the accumulative effect reached two years, the synergetic enhancement effect of the noise on the high frequency hearing threshold was shown. At the same time, the accumulative effect reached one year, and there was obvious difference of high frequency hearing threshold among the noise groups. When the accumulative effect reached two years and three years, there was significant difference of high frequency hearing threshold between each high temperature group and each noise group, and the effect on the annual hearing threshold loss rate: the high temperature did not show the effect of synergistic enhancement noise on the loss rate of annual speech frequency threshold. But the high temperature shows the effect of synergistic enhancement noise on the loss rate of annual high frequency hearing threshold. At the same time, there were obvious differences in the loss rate of annual speech frequency threshold and annual high frequency hearing threshold loss between each high temperature group and each noise group. Conclusion: exposure to high temperature to a certain level and a certain number of years, hyperthermia will have a certain degree of adverse effects on hearing. The high frequency hearing threshold is more sensitive to temperature than the speech frequency hearing threshold. Relative to high temperature, noise has more influence on hearing, especially on high frequency hearing threshold. High temperature shows the effect of synergistic enhancement noise on the high frequency hearing threshold, but it does not show the effect of synergetic enhancement noise on the speech frequency hearing threshold. The effect of high temperature on hearing is based on a certain degree of noise exposure.
【学位授予单位】：重庆医科大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：R131
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