Noise induced hearing loss in metallurgical workers

Abstract

Introduction: Noise induced hearing loss is a cumulative pathological disease that increases over the years with exposure to noise associated with the work environment. Objectives: To identify and quantify the occurrence of hearing loss suggestive of Noise Induced Hearing Loss (NIHL) and the main otolaryngological symptoms referred by workers. Study design: prospective clinical randomized. Material and method: The research study was carried out from January to March 2000 with 187 metallurgical workers in the city of Goiania, who were evaluated by otolaryngologists by means of a combination of interview and occupational hearing exams. Results: Occupational hearing test results were: 21% suggestive of NIHL, 72% normal, and 7% suggestive of other hearing impairments. The most frequent hearing symptoms were: difficulty in understanding speech 12%, Hearing loss 7%, Tinnitus 13%, ear fullness sensation 4%, otorrhea 6%, and Dizziness 12%. Conclusion: We concluded that in metallurgy industries there is the occurrence of hearing loss suggestive of NIHL and complaints of significant otolaryngological symptoms.