Prevalence hearing loss of truck and bus drivers in a cross-sectional study of 65533 subjects

A Comprehensive Review of Auditory and Non-Auditory Effects of Noise on Human Health

OBJECTIVE

Excessive noise is unpleasant and induces several physiological and psychological effects. Noise pollution is a potential threat to humans, particularly those continuously exposed for extended periods throughout the day over many years. This review aims to examine the various auditory and non-auditory outcomes associated with prolonged exposure to noise pollution.

MATERIALS AND METHODS

The review utilized a combination of relevant keywords to search the electronic databases. After screening based on the applied selection criteria for title, abstract, and full text, 44 articles were finally selected for critical review.

RESULTS

We identified and analyzed research findings related to noise-induced hearing loss, tinnitus, and sleep disturbances along with non-auditory issues such as annoyance, cognitive impairments, and mental stress associated with cardiovascular disorders. Furthermore, the existing studies were compared and collated to highlight the unique challenges and significance of noise pollution as a distinctive environmental concern and to explore the ongoing efforts in its research and prevention, including the early detection and potential reversal of noise-induced hearing loss.

CONCLUSION

The fundamental health consequences of noise pollution underscore the need for extensive research encompassing emerging noise sources and technologies to establish a health management system tailored to address noise-related health concerns and reduce noise exposure risk among populations. Finally, further research is warranted to ensure improved measurement of noise exposure and related health outcomes, especially in the context of occupational noise.

Investigating the prevalence of hearing loss and its related factors in professional drivers in Shahroud city, Iran

Objectives. A cohort study was designed and implemented to determine the prevalence of hearing problems and their related factors in professional drivers in Shahroud city. Methods. In total, 1461 professional drivers were examined. Demographic information, work history, blood parameters, and anthropometric and audiometric test data were collected. Hearing thresholds were assessed at frequencies of 500, 1000, 2000, 3000, 4000, 6000 and 8000 Hz. Results. In total, 64.8% and 54.9% of hearing impairment degrees were observed in the left and right ears, respectively, and this difference was statistically significant. The hearing threshold in the left ear was higher at all frequencies. The maximum hearing loss was at 6000 Hz, followed by 4000 Hz. There was a significant relationship between hearing loss with age groups for right and left ears and type of car for left ear. Conclusion. The prevalence and severity of hearing loss in Shahroud drivers are high, and most hearing loss is observed in the left ear. Given that noise-induced hearing loss is an incurable condition and has a significant impact on individuals' quality of life and employment, drivers should be regularly screened for ear damage under the variables affecting hearing loss, and noise prevention training should be provided.