School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Institute for Cognitive and Brain Science, Shahid Beheshti University, Tehran, Iran.
Int J Occup Saf Ergon. 2021 Sep;27(3):831-839. doi: 10.1080/10803548.2019.1659578. Epub 2019 Oct 4.
. Noise and heat are the most important physical hazardous agents that can affect physiological parameters. This study investigated the independent and combined effects of noise and heat exposure on human saliva cortisol and blood pressure. . In this experimental study, 72 students were exposed to noise (at sound pressure levels of 45, 75, 85 and 95 dB()) and heat (at wet bulb globe temperatures [WBGTs] of 22, 29 and 34 °C) for 30 min. Samples of saliva and blood pressure were taken before and after each independent and combined exposure. . The results revealed that the average saliva cortisol and blood pressure in male and female subjects increased significantly after independent exposure to noise at 95 dB() and a WBGT of 34 °C. The combined exposure to noise and heat increased saliva cortisol and blood pressure, which was statistically significant for three combinations of 95 dB() at 34 °C, 95 dB() at 29 °C and 85 dB() at 34 °C. . Combined exposure to noise and heat could affect saliva cortisol and blood pressure in both male and female groups. Further studies are recommended to capture other combinations of physical hazardous agents, especially in the field.
. 噪声和热是可能影响生理参数的最重要的物理危害因素。本研究调查了噪声和热暴露对人唾液皮质醇和血压的独立和联合影响。. 在这项实验研究中，将 72 名学生暴露于噪声（声压级分别为 45、75、85 和 95dB()）和热（湿球黑球温度[WBGT]分别为 22、29 和 34°C）中 30 分钟。在每次单独和联合暴露前后采集唾液和血压样本。. 结果表明，男性和女性受试者在单独暴露于 95dB()噪声和 34°C 湿球黑球温度后，唾液皮质醇和血压的平均值显著升高。噪声和热的联合暴露增加了唾液皮质醇和血压，其中 34°C 时 95dB()、29°C 时 95dB()和 34°C 时 85dB()三种组合的变化具有统计学意义。. 噪声和热的联合暴露可能会影响男性和女性群体的唾液皮质醇和血压。建议进行进一步的研究，以捕捉其他物理危害因素的组合，特别是在现场。
