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:: Volume 3, Issue 4 (winter 2018) ::
3 2018, 3(4): 275-284 Back to browse issues page
Evaluating the Combined Effect of Noise and Heat Exposure on Heart Rate of Males in Climatic Chamber
A Karimi, B Mahaki, M.T Bastami , S Zarei, S Fooladlou
Health Department of the Red Crescent Society of Ilam
Abstract:   (42 Views)
Background & objectives: Exposure to noise and heat causes individually make some changes in the function of cardiovascular system in workplaces. This study was performed to find the effect of combined effect to heat and noise on heart rate in experimentally controlled conditions.
Methods: This experimental study was performed on 12 health males in climatic chamber in 2014. Heart rate were measured in the following condition; 15 minutes after resting, in heat exposure only (40℃, RH: 30%), in noise exposure (75 dB, 85 dB and 95dB in thermal comfort condition (WBGT=22.1±0.9) and combined exposure to heat (40℃, RH: 30%) and noise (75, 85 and 95 dB). Friedman test (SPSS-20) was used to analyze the data.
Results: The mean heart rate showed significant difference before and after exposure to heat and noise with the mentioned levels (p>0.001), so that the heart rate increase in heat exposure only 14.47 beats per minute (bpm), noise exposures only in the levels of 75, 85 and 95 dB were 10.36, 11.95, and 14.98 bpm respectively, and combined exposed to heat and noise (75, 85 and 95dB) were 15.36, 18.58, and 80.16 bpm respectively.
Conclusion: The effect of heat on the increase in heart rate was more than noise, and In the combined exposure to noise and heat in compare to exposure only to noise or heat, increasing of the heart rate was higher.
Keywords: Noise, Heat Stress, Combined Effect, Heart Rate, Climatic Condition
Full-Text [PDF 234 kb]   (11 Downloads)    
Type of Study: Research | Subject: General
Received: 2019/09/28 | Accepted: 2019/09/28 | Published: 2019/09/28
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Karimi A, Mahaki B, Bastami M, Zarei S, Fooladlou S. Evaluating the Combined Effect of Noise and Heat Exposure on Heart Rate of Males in Climatic Chamber. 3. 2018; 3 (4) :275-284
URL: http://oeh.arums.ac.ir/article-1-169-en.html


Volume 3, Issue 4 (winter 2018) Back to browse issues page
فصلنامه سلامت محیط و کار Occupational and Environmental Health
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