Volume 3, Number 3 ( Journal of Occupational Hygiene Engineering, Autumn 2016)                   johe 2016, 3(3): 1-8 | Back to browse issues page

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Dehghan H, Gharib S. The effect of noise exposure on heart rate in the hot and humid conditions in climatic chamber. johe. 2016; 3 (3) :1-8
URL: http://johe.umsha.ac.ir/article-1-237-en.html

associate of prof. isfahan uni of medical scinces , ha_dehghan@hlth.mui.ac.ir
Abstract:   (1193 Views)

Introduction: In some jobs, physical activity can be done in high noise pollution that can affect the heart rate. The aim of this study was to investigate the effects of noise exposure and physical activity on heart rate in the hot and humid conditions.

Materials and Methods:  This experimental study was performed on 14 healthy men in hot and humid climatic chamber (35 °C, 75% RH). Heart rate was measured at rest, sitting, low workload, moderate workload and heavy workload in non- noise exposure trial and noise exposure trials in levels of 65, 75, 85 and 95(dBA).

Results: In hot and humid weather conditions. In the sitting, low workload, moderate workload and heavy workload  situations  heart rate average was significantly between non- exposure to noise and noise exposure at level of 65, 75, 85 and 95 dB (A) (P <0.05). In all activity levels heart rates increased with increasing sound intensity significantly. Heart rate increased in noise more than the tthreshold limit value in moderate and heavy workload was more than low workload.

Conclusion: According to the additive effects noise exposure on heart rate in the hot and humid conditions, workload  level are considered a higher level in the hot and humid compared with thermal comfort conditions  if exposure to noise over 85 dBA.

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Type of Study: Research Article | Subject: Special

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