ArticleFrontiers in public health2026
Noise matters: assessing non-auditory health impacts of occupational noise exposure among factory workers.
Article in Frontiers in public health, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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7 authors.
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Abstract
Background: Industrial noise exposure is a global occupational hazard, with increasing recognition of its deleterious non-auditory effects. Although the auditory consequences of excessive noise are well-known, an emerging body of evidence suggests significant impacts on cognition, cardiovascular and metabolic functions. India with a burgeoning industrial workforce and limited occupational health surveillance, remains under-researched in this domain. Objectives: This study investigates the physiological and sensory processing impact of occupational noise exposure among industrial workers in Guwahati, a rapidly industrializing region in Northeast India. Methods: A longitudinal study was conducted involving 590 workers from various factories in Guwahati. Ambient noise levels were recorded using calibrated sound level meters. Workers were assessed before and after their work shifts for sensory processing (via reaction time tests), cardiovascular health (blood pressure and heart rate), metabolic health (blood glucose levels), and stress markers (blood cortisol). Ethical clearance was obtained from the Institutional Ethics Committee. Results: Noise levels across the industrial settings ranged from 62.2 dB(A) to 91.8 dB(A). High noise levels were particularly noted in batch manufacturing rooms and weighing machine areas. Significant post-shift increases were observed in systolic and diastolic blood pressure (mean increases of 13.2 mmHg and 9.3 mmHg respectively, Conclusion: The study demonstrates significant non-auditory impacts of occupational noise exposure, suggesting impaired cognition, heightened physiological stress, and acute alterations in metabolic markers among industrial workers. These findings highlight the need for preventive noise management strategies and short-term occupational health monitoring, engineering controls, and routine health surveillance to mitigate these effects. Practical applications: Our findings demonstrate the need for factories to adopt effective noise control measures such as engineering modifications, administrative controls, and mandatory hearing protection. These steps can reduce workers' noise exposure, minimizing physiological stress and cognitive impairments, and thus improve overall occupational health and productivity.
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