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为了研究生产噪声对人体的影响,检验不同频谱组成的A声级对人的生理效应及噪声级可因接触时间减半而相应增加5分贝的观点的实用价值,选择听力正常的健康青年男女各10名为对象,观察他们在三种噪声环境,两种噪声暴露时间下的一些生理指标的变化,共作113人次实验,初步结论是:(1)在高频100分贝(A)噪声环境下暴露1小时者,比在中频100分贝(A)噪声环境下暴露相同时间者,其听力损失与主观感觉明显增大,这提醒我们用分贝(A)评价不同频谱组成的噪声环境时应慎重;(2)在高频100分贝(A)噪声环境下暴露1小时者,比在
In order to study the impact of production noise on the human body, to test the practical value of the A sound level composed of different frequency spectrum on human physiological effects and noise level can be increased by 5 dB due to the contact time halved, the healthy young men and women 10 were selected to observe the changes of some physiological indexes under three noise environments and two noise exposure times. A total of 113 experiments were conducted. The preliminary conclusions are as follows: (1) Under the high-frequency 100 dB noise environment When exposed for 1 hour, their hearing loss and subjective sensation increased significantly when they were exposed for the same time in a noise environment with a mid-frequency of 100 dB (A), which reminds us to be careful when using decibels (A) to evaluate noise environments with different spectral compositions; (2) In the high-frequency 100 dB (A) noise environment exposed for 1 hour, than in