Prevalence of permanent hearing threshold shift among workers of Indian iron and steel small and medium enterprises: A study
| Autor: | Lakhwinder Pal Singh, Arvind Bhardwaj, Deepak Kishore Kumar |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: | |
| Zdroj: | Noise and Health, Vol 14, Iss 58, Pp 119-128 (2012) |
| Druh dokumentu: | article |
| ISSN: | 1463-1741 1998-4030 |
| DOI: | 10.4103/1463-1741.97256 |
| Popis: | Occupational noise exposure and noise-induced hearing loss (NIHL) have been recognized as a problem among workers in Indian industries. The major industries in India are based on manufacturing. There are appreciable numbers of casting and forging units spread across the country. The objective of this study is to determine the prevalence of permanent hearing threshold shift among the workers engaged in Indian iron and steel small and medium enterprises (SMEs) and compared with control group subjects. As a part of hearing protection intervention, audiometric tests were conducted at low (250-1000 Hz), medium (1500-3000 Hz), and high (4000-8000 Hz) frequencies. The occurrence of hearing loss was determined based on hearing threshold levels with a low fence of 25 dB. Comparisons were made for hearing threshold at different frequencies between the exposed and control groups using Student′s t test. ANOVA was used for the comparison of hearing threshold dB at different frequencies among occupation and year of experience. A P value |
| Databáze: | Directory of Open Access Journals |
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