Assessment of Hearing Loss and Its Correlates among Industrial Workers of Kanpur

Abstract

Introduction

Prolonged noise exposure poses a substantial risk to public health, resulting in noise induced hearing loss. This purpose of this study to assess the magnitude of occupational noise induced hearing loss and to study its correlation with various contributing factors.

Materials &Methods

 A prospective longitudinal study was conducted on 426 industrial workers, aged 18-55 years, predominantly men (mean age 39.83 ± 0.76 yrs), exposed to noise levels of 85 dB or higher. Hearing assessments were conducted by Pure Tone Audiometry at time of presentation and followed up at 3, 6 and 12 months.

Result

Hearing loss affected 39.7% (169/426) of workers, mainly aged 30–50 yrs, with mild bilateral sensorineural impairment. A statistically significant association was found with noise exposure duration, intensity, and daily working hours. However, one-year follow-up showed no correlation, indicating that long-term exposure is key to hearing loss development.

Conclusion

The study highlights the need for regular hearing assessments, mandatory use of protection devices, and stronger conservation measures, as prolonged noise exposure, long work hours, and high sound levels significantly increase hearing loss risk.