ABSTRACT
OBJETIVO: Avaliar a audição e a ocorrência de mudança significativa do limiar auditivo em trabalhadores de frigoríficos expostos a níveis de ruído abaixo das Normas e Regulamentações nacionais e internacionais e compará-los com trabalhadores expostos a níveis de ruído considerados excessivos. MÉTODOS: Utilizou-se um banco de dados contendo informações longitudinais de 266 trabalhadores. Foram selecionados trabalhadores com um mínimo de três exames audiométricos e os que continham dados de exposição ao ruído. Foram mantidos 63 exames, classificados de acordo com sua exposição ao ruído em três níveis: 79 a 84,9 dB(A), 85 a 89,9 dB(A) e 90 a 98,8 dB(A). Foi avaliada a ocorrência de perdas auditivas e de mudança significativa de limiar auditivo dos participantes de cada subgrupo. RESULTADOS: Verificou-se diferenças em todas as frequências nos testes de comparação entre a média dos limiares auditivos para cada frequência em função do nível de exposição ao ruído. A correlação entre a ocorrência de Perda Auditiva Induzida por Níveis de Pressão Sonora Elevados (PAINPSE) e os anos de exposição ao ruído dentro da empresa atual foi significativa (R=0,373; p=0,079). Foram encontradas mudanças permanentes de limiar auditivo nos três níveis de exposição ao ruído. CONCLUSÃO: Os achados do presente estudo sugerem a existência de uma associação entre mudança significativa do limiar auditivo dos trabalhadores e os anos de exposição ao ruído considerado de baixo risco.
PURPOSE: To assess the hearing status and signs of significant auditory threshold shifts in meat-processing facility workers who are exposed to noise levels below nationally and internationally recommended exposure limits, and to compare these results with data from workers exposed to excessive noise levels. METHODS: Longitudinal audiometric data from 266 workers were evaluated, and only workers with a minimum of three audiometric test results and noise exposure records were selected for this study. The 63 assessments selected were classified according to subjects' noise exposure into three levels: 79 to 84.9 dB(A), 85 to 89.9 dB(A), and 90 to 98.9 dB(A). Occurrences of hearing loss and significant auditory threshold shifts were assessed, in each group. RESULTS: Differences in the mean thresholds were observed in all test frequencies among the different groups. A significant correlation was found between occurrence of noise-induced hearing loss and duration of noise exposure (in years) at the present industrial facility (R=0.373; p=0.079). Significant auditory threshold shifts were found in all three levels of noise exposure. CONCLUSION: The findings of the present study suggest the existence of an association between significant auditory threshold shifts in workers and the years of exposure to low risk noise levels.
Subject(s)
Humans , Hearing Loss, Noise-Induced , Legislation , Noise, Occupational , Occupational Exposure , Permissible Limit of Occupational HazardsABSTRACT
UNLABELLED: Tinnitus is a common auditory complaint among individuals exposed to noise. AIM: this paper aims to study the characteristics of tinnitus in workers exposed to noise. STUDY DESIGN: this is a descriptive prospective study. MATERIALS AND METHOD: Fifty-two individuals averaging 29 years of age were enrolled in a hearing loss prevention program at a meat processing plant. The participants were interviewed and had their hearing tested in 2005 and 2006. RESULTS: seventy-one percent of the participants were found to have normal hearing. Tinnitus was present in 16% of the males and in 9% of the females. Mean noise exposure length was 7 years and noise levels ranged from 86 to 91 dBA (48%). Bilateral tinnitus (46%) of the hissing type (40%) and moderate intensity (49%) was the most prevalent. Symptoms began to be observed within one to five years after initial exposure to noise (67%) and manifested themselves in weekly episodes (41%) that bothered the patients mostly at night (34%). A significant correlation was observed between the frequency of tinnitus episodes and the noise levels to which workers were exposed. CONCLUSION: tinnitus should be included in hearing loss prevention programs in order to more comprehensively promote occupational hearing health.
Subject(s)
Noise, Occupational/adverse effects , Occupational Diseases/etiology , Occupational Exposure/adverse effects , Tinnitus/etiology , Adult , Audiometry, Pure-Tone , Female , Humans , Male , Occupational Diseases/diagnosis , Prospective Studies , Severity of Illness Index , Surveys and Questionnaires , Time Factors , Tinnitus/diagnosisABSTRACT
O zumbido é um sintoma auditivo relatado por indivíduos expostos ao ruído. Objetivo: Estudar as características do zumbido relatadas por indivíduos expostos ao ruído ocupacional. Forma de Estudo: Descritivo prospectivo. Material e Método: Participaram 52 indivíduos com idade média de 29 anos que faziam parte do programa de prevenção da perda auditiva de um frigorífico. Os indivíduos responderam a uma anamnese e suas audiometrias realizadas em 2005 e 2006 foram utilizadas. Resultados: No presente estudo, 71% dos indivíduos apresentaram audiometria normal. A prevalência do zumbido para o sexo masculino foi de 16% e para o sexo feminino foi de 9% apresentando tempo médio de exposição ao ruído de sete anos a um nível médio de ruído entre 86 e 91 dBA (48%). Verificou-se um predomínio do zumbido bilateral (46%), do tipo chiado (40%) de intensidade média (49%), com tempo de instalação do sintoma entre um a cinco anos (67%), sendo sua freqüência semanal (41%) e a noite o período que mais perturba (34%). Encontrou-se significância entre a periodicidade do zumbido e o nível de ruído. Conclusão: Recomenda-se a inclusão do tema zumbido em programas de prevenção da perda auditiva a fim de promover a saúde auditiva dos trabalhadores.
Tinnitus is a common auditory complaint among individuals exposed to noise. Aim: this paper aims to study the characteristics of tinnitus in workers exposed to noise. Study design: this is a descriptive prospective study. Materials and method: Fifty-two individuals averaging 29 years of age were enrolled in a hearing loss prevention program at a meat processing plant. The participants were interviewed and had their hearing tested in 2005 and 2006. Results: seventy-one percent of the participants were found to have normal hearing. Tinnitus was present in 16% of the males and in 9% of the females. Mean noise exposure length was 7 years and noise levels ranged from 86 to 91 dBA (48%). Bilateral tinnitus (46%) of the hissing type (40%) and moderate intensity (49%) was the most prevalent. Symptoms began to be observed within one to five years after initial exposure to noise (67%) and manifested themselves in weekly episodes (41%) that bothered the patients mostly at night (34%). A significant correlation was observed between the frequency of tinnitus episodes and the noise levels to which workers were exposed. Conclusion: tinnitus should be included in hearing loss prevention programs in order to more comprehensively promote occupational hearing health.
Subject(s)
Adult , Female , Humans , Male , Noise, Occupational/adverse effects , Occupational Diseases/etiology , Occupational Exposure/adverse effects , Tinnitus/etiology , Audiometry, Pure-Tone , Occupational Diseases/diagnosis , Prospective Studies , Severity of Illness Index , Surveys and Questionnaires , Time Factors , Tinnitus/diagnosisABSTRACT
This study evaluated the interference of tinnitus on the quality of life for noise-exposed workers enrolled in a hearing conservation program. Noise measurements, a questionnaire, a Brazilian version of the Tinnitus Handicap Inventory (THI), and pure-tone audiometry were conducted with 52 participants (mean age, 29 years) who suffered from tinnitus. THI results indicated that tinnitus had the greatest influence in the functional scale (54%). Significant correlations (p < .05) were observed between the periodicity of tinnitus and noise exposure level; degree of tinnitus and exposure to chemicals; total THI score and the scores of the catastrophic, emotional, and functional scales; score of the emotional scale and the functional scale; and results of the THI and the general state of health. An evaluation of tinnitus and its impact could benefit tinnitus sufferers in the workplace.
