Influence of environmental factors on the evolution of industrial noise-induced hearing loss
Influence of environmental factors on the evolution of industrial noise-induced hearing loss
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DOI：
10.1007/s10661-005-3107-1
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发表时间：
2005-08-01
影响因子：
3
通讯作者：
Domenico, G
中科院分区：
文献类型：
--
作者：
Abbate, C;Concetto, G;Domenico, G
这项研究的目的是调查与工业噪声暴露相关的环境因素如何影响慢性噪声导致的听力损失。这项研究的186名男性受试者分别在两家装瓶厂工作，这两家工厂分别位于一个小型农业社区和一个噪声污染水平严重的中等城市。两组的职业暴露水平相同。通过初步体检选择受试者，并接受音调听力测试和声阻抗测试。对两组在500、1000、2000和4000赫兹频率下测得的听阈值进行统计分析，结果显示两组听阈比较有统计学意义，尤其是4000赫兹频率和职业接触超过17年时，差异有统计学意义。这一结果使我们得出结论，环境因素，特别是城市噪音，影响职业性声创伤的发生和发展，在农村工作的人受到的影响比在城市工作的人要小得多。由于两组的职业性暴露是相同的，因此他们的不同反应必须被解释为由于非职业性暴露的差异，而非职业性暴露又取决于从噪声中休息的不同机会和噪声污染的不同暴露水平。
The aim of the study is to investigate how environmental factors, associated with exposure to industrial noise, affect the development of chronic noise-induced hearing loss.The studywas conducted on 186 male subjectsworking in two bottling plants, situated respectively in a small farming community, and in a medium-sized city with significant levels of noise pollution. Levels of occupational exposure were the same for the two groups.The subjects were selected by means of a preliminary medical examination, and exposed to tonal hearing tests and acoustic impedance tests. Statistical analysis was performed on hearing threshold values obtained at the frequencies of 500, 1000, 2000 and 4000 Hz.The comparison between the thresholds obtained in the two groups showed a statistically significant difference, especially at the frequency of 4000 Hz and for occupational exposure exceeding 17 yr. The results led us to conclude that environmental factors, and urban noise in particular, influence the onset and development of occupational acoustic trauma, and that those working in the country are significantly less affected than those in the city. Since occupational exposure was the same for both groups, their different responses must therefore be interpreted as due to differences in nonoccupational exposure, in turn dependent on different opportunities for rest from noise and different levels of exposure to noise pollution.