A study on diagnostic criteria of noise-induced hearing loss among workers in an iron foundry / 예방의학회지

ABSTRACT

This study was carried out to evaluate diagnostic criteria of noise-induced hearing loss (NIHL) among workers in an iron foundry. Of 1,093 workers under the observation of noise-specific health examination, 184 workers were selected by way of first and second screening audiometric examination. A questionnaire survey, otological examinations, Rinne test and audiometric test were performed and the results were as follows; The degree of hearing impairment in the left ear was more severe than in the right ear(p0.05). If we apply Early Loss Index(ELI) method, some workers in younger age group diagnosed as NIHL by the new diagnostic criteria were fallen into within the normal range. In the mean time older age group show reverse results in contrast to the above finding. It is too early to confirm the value of the usage of the new diagnostic criteria in hearing examination. Further study is called for to verify the value of this criteria.