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Home / Regular Issue / JTAS Vol. 31 (2) Mar. 2023 / JST-3552-2022


Heat Stress and Noise Exposure Levels in a Manufacturing Plant

Qi Jie Kwong, Nursyifaasahirah Terbizi, Normaisarah Nordin, Emma Marinie Ahmad Zawawi, Azli Abd Razak and Jamalunlaili Abdullah

Pertanika Journal of Tropical Agricultural Science, Volume 31, Issue 2, March 2023


Keywords: Heat stress, manufacturing plant, noise exposure, Wet-bulb Globe Temperature (WBGT), workplace

Published on: 20 March 2023

This paper analyses skilled workers' heat stress and noise exposure levels at a pressure vessel manufacturing plant. Measurements were conducted at three partially enclosed workspaces of the plant where hot work and metal fabrications were conducted using a multi-function thermal environment data logger and a sound level recorder. A survey was developed to obtain the field workers’ perceptions of their immediate heat and noise environments. The findings suggested that the heat and noise conditions were generally acceptable. The calculated mean Wet-bulb Globe Temperature (WBGT) indicated that there was only minimal risk of heat stress for the workers. It was also identified that the noise intensities in the sections studied were within the permissible exposure limit for an 8-hour duration specified in the Department of Occupational Safety and Health (DOSH) guideline. Besides, questionnaire survey results showed that the thermal and noise conditions at the workplace were acceptable. The workers perceived their work environment as warm with sensible air movement, moderately humid, free from heat and noise-related injuries, and able to have clear conversations with their co-workers while working.

  • Aalto, L., Lappalainen, S., Salonen, H., & Reijula, K. (2017). Usability evaluation (IEQ survey) in hospital buildings. International Journal of Workplace Health Management, 10(3), 265-282.

  • Andrew, P. H. (2011). Heat strain, hydration status and symptom of heat illness in surface mine workers (Doctoral dissertation). Queensland University of Technology, Australia.

  • Bartkowiak, G., Dąbrowska, A., & Marszałek, A. (2014). Assessment of the human responses to the influence of personal liquid cooling system in the hot environment. International Journal of Clothing Science and Technology, 26(2), 145-163.

  • Bell, N., Lunt, J., Webster, J., & Ward, T. (2015). Comparing high and low performers for noise control. International Journal of Workplace Health Management, 8(1), 46-60.

  • Bernard, T. E. (1999). Heat stress and protective clothing: and emerging approach from the United States. The Annals of Occupational Hygiene, 43(5), 321-327.

  • Berry, H. L., Bowen, K., & Kjellstrom, T. (2010). Climate change and mental health: A causal pathways framework. International Journal of Public Health, 55, 123-132.

  • Bockstael, A., De Bruyne, L., Vinck, B., & Bottledooren, D. (2013). Hearing protection in industry: Companies’ policy and workers’ perception. International Journal of Industrial Ergonomics, 43(6), 512-517.

  • Bureau of Labor Statistics (2017). The economics daily, work injuries in the heat in 2015. U.S. Department of Labour.

  • Chen, C., Dai, Y., Sun, Y., Lin, Y., & Juang, Y. (2007). Evaluation of auditory fatigue in combined noise, heat and workload exposure. Industrial Health, 45(4), 527-534.

  • DOSH. (2016). Guideline of heat stress management at work place. Ministry of Human Resources Malaysia.

  • DOSH. (2019a). Industry code of practice for management of occupational noise exposure and hearing conservation 2019. Ministry of Human Resources Malaysia.

  • DOSH. (2019b). Occupational safety and health (Noise Exposure) Regulations 2019. Ministry of Human Resources Malaysia.

  • Dutta, P., Rajiva, A., Andhare, D., Azhar, G. S., Tiwari, A., & Sheffield, P. (2015). Perceived heat stress and health effects on construction workers. Indian Journal of Occupational and Environmental Medicine, 19(3), 151-158.

  • Edelson, J., Neitzal, R., Meischke, H., Danielle, W., Shepperd, L., Stover, B., & Seixas, N. (2009). Predictors of hearing protection use in construction workers. The Annals of Occupational Hygiene, 53(6), 605-615.

  • Edem, M. J., Akpan, E. U., & Pepple, N. M. (2017). Impact of workplace environment on health workers. Occupational Medicine and Health Affair, 5(2), Article 1000261.

  • Gravel, S., Rhéaume, J., & Legendre, G. (2011). Strategies to develop and maintain occupational health and safety measures in small businesses employing immigrant workers in metropolitan Montreal. International Journal of Workplace Health Management, 4(2), 164-178.

  • Joubert, D., & Bates, G. (2008). Occupational heat exposure Part 1: The physiological consequences of heat exposure in the occupational environment. Occupational Health Southern Africa, 2008, 1-5.

  • Lusk, S. L., Hong, O. S., Ronis, D. L., Eakin, B. L., Kerr, M. J., & Early, M. R. (1999). Effectiveness of an intervention to increase construction workers’ use of hearing protection, The Journal of Human Factors and Ergonomics Society, 41(3), 487-494.

  • Krishnamurthy, M., Ramalingam, P., & Perumal, K. (2017). Occupational heat stress impacts on health and productivity in a steel industry in southern India. Safety and Health at Work, 8(1), 99-104.

  • Manivasagam, D. (2019). Empowering occupational health doctors through the occupational safety & health (noise exposure) regulations 2019. Journal of Occupational Safety and Health, 16(3), 1-7.

  • Meegahapola, P. A., & Ranga Prabodanie, R. A. (2018). Impact of environmental conditions on workers’ productivity and health. International Journal of Workplace Health Management, 11(2), 74-84.

  • Mohammed, M. I., & Rabeea, M. A. (2021). Effects of noise pollution from electric backup generators on the operators’ health. Pertanika Journal of Science and Technology, 29(4), 2675-2687.

  • Nelson, D. I., Nelson, R. Y., Concha-Barrientos, M., & Fingerhut, M. (2005). The global burden of occupational noise-induced hearing loss. American Journal of Industrial Medicine, 48(6), 446-458.

  • Oseland, N., & Hodsman, P. (2018). A psychoacoustical approach to resolving office noise distraction. Journal of Corporate Real Estate, 20(4), 260-280.

  • Pancardo, P., Acosta, F. D., Hernández-Nolasco, J. A., Wister, M. A., & López-de-Ipiña, D. (2015). Real-Time personalized monitoring to estimate occupational heat stress in ambient assisted working. Sensors (Basel, Switzerland), 15(7), 16956-16980.

  • Parsons, K. (2006). Heat stress standard ISO 7243 and its global application. Industrial Health, 44(3), 368-379.

  • Parsons, K. (2014). Human Thermal Environments: The Effects of Hot, Moderate, and Cold Environments on Human Health, Comfort, and Performance (3rd ed.). CRC Press.

  • Pogačar, T., Casanueva, A., Kozjek, K., Ciuha, U., Mekjavić, I. B., Bogataj, L. K., & Črepinšek, Z. (2018). The effect of hot days on occupational heat stress in the manufacturing industry: implications for workers’ well-being and productivity. International Journal of Biometeorology, 62, 1251-1264.

  • Rabeiy, R. E. (2019). Evaluation of indoor heat stress on workers of bakeries at Assiut City, Egypt. International Journal of Environmental Science and Technology, 16, 2637-2642.

  • Ravanelli, N. M., Hodder, S. G., Havenith, G., & Jay, O. (2015). Heart rate and body temperature responses to extreme heat and humidity with and without electric fans. JAMA, 313(7), 724-725.

  • Singh, L. P., Bhardwaj, A., & Deepak, K. K. (2010). Occupational exposure in small and medium scale industry with specific reference to heat and noise. Noise Health, 12(46), 37-48.

  • Srinivasan, K., Maruthy, K. N., Venugopal, V., & Ramaswamy, P. (2016). Research in occupational heat stress in India: Challenges and opportunities. Indian Journal of Occupational and Environmental Medicine, 20(2), 73-78.

  • Sriopas, A., Chapman, R. S., Sutammasa, S., & Siriwong, W. (2017). Occupational noise-induced hearing loss in auto part factory workers in welding units in Thailand. Journal of Occupational Health, 59(1), 55-62.

  • Tawatsupa, E., Yiengprugsawan, V., Kjellstrom, T., Berecki-Gisolf, J., Seubsman, A., & Sleigh, A. (2013). Association between heat stress and occupational injury among Thai workers: Findings of the Thai cohort study. Industrial Health, 51(1), 34-46.

  • Toe, D. H. C., & Kubota T. (2013). Development of an adaptive thermal comfort equation for naturally ventilated buildings in hot–humid climates using ASHRAE RP-884 database. Frontiers of Architectural Research, 2(3), 278-291.

  • Tomozei, C., Astolfi, A., Nedeff, V., & Lazar, G. (2012). Noise sources characterisation inside and outside a factory. Environmental Engineering and Management Journal, 11(3), 701-708.

  • Venugopal, V., Chinnadurai, J. S., Lucas, R. A., & Kjellstrom, T. (2015). Occupational heat stress profiles in selected workplaces in India. International Journal of Environmental Research and Public Health, 13(1), Article 89.

  • Xiang, J., Bi, P., Pisaniello, D., & Hansen, A. (2014). Health impacts of workplace heat exposure: An epidemiological review. Industrial Health, 52(2), 91-101.

  • Yang, X., Li, B., Li, Y., Wang, Y., & Zheng, C. (2017). A research on characteristics of human heat stress in dynamic hot environment. Procedia Engineering, 205, 2749-2754.

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