Processamento auditivo de militares expostos a ruído ocupacional

Abstract

RESUMOObjetivo: avaliar o processamento auditivo de militares expostos a ruído ocupacional. Métodos: foram avaliados 41 militares, com exposição a ruído superior a 10 anos, subdivididos em Grupo A (n =16), sem perda auditiva e Grupo B (n = 25), com perda auditiva. Foram realizadas avaliação audiológica básica e testes de processamento auditivo (testes de Fala Filtrada, SSW em Português e de Padrão de Freqüência). Resultados: observou-se altas incidências de alteração de processamento auditivo, especialmente no teste de Fala Filtrada (43,75% e 68% nos grupos A e B, respectivamente) e teste de Padrão de Freqüência (68,75% e 48%, nos grupos A e B, respectivamente). O teste SSW não se mostrou efi ciente para avaliar as habilidades auditivas centrais de indivíduos expostos a elevados níveis de pressão sonora. Conclusão: a exposição a ruído ocupacional interfere no processamento auditivo de militares. As alterações na via auditiva central podem ser verifi cadas independente da presença de alteração auditiva periférica.

Efeitos do mp3 player na audição

“…This characteristic is reported as induced by high sound pressure levels hearing loss, described in the literature as permanent threshold shift resulting from overexposure to noise, the sensorineural type, usually bilateral and symmetrical, irreversible 10,11,12,13,14,15,16,17 , mild and severe at low frequencies at high frequencies, with typical audiometric configuration (V-shaped notch) in the frequency range of 6000, 4000 and / or 3000 Hz, which progresses slowly at frequencies of 8000, 2000, 1000, 500 and 250 Hz and reaches its maximum level at higher frequencies, in the first 10-15 years of stable to high sound pressure level (SPL) exposure and stops its progression once exposure stops…”

Testes tonais de padrão de frequência e duração no Brasil: revisão de literatura

“…The results showed that 68.75% of the group without hearing loss and 48 % of the group with hearing loss had abnormal results on at least one of the conditions (humming or nomination) in at least one ear, no statistically significant difference was observed between the average of the test results between the left and right ear. The findings of this study concludes that exposure to occupational noise impacts the auditory processing of military personnel, and alterations in the central auditory pathway was observed regardless the presence of peripheral hearing impairment 37 .…”

Aplicação do teste SSW em indivíduos com perda auditiva neurossensorial usuários e não usuários de aparelho de amplificação sonora individual

“…The two models seek to explain the advantage of the right ear and consequent disadvantage of the left ear in dichotic tests. This asymmetry occurs, partly because of a decline in cognitive abilities, and partly because of a decline in the efficiency of interhemispheric information transfer [19][20][21][22][23][24][25] . According to the literature, the structural model justifies perceptual asymmetry: the information pre sented in the right ear travels directly to the left hemisphere.…”

“…In order to meet the need for direction listening to the left, greater activation and involvement of cognitive (top-down) functions are required. As these functions deteriorate with age, asymmetry of the ears may be observed during dichotic tests applied in elderly persons 22,[25][26][27][28][29] . These models alone are unable to justify the effect of aging on asymmetry of the ears, therefore there may be an association of both in dichotic listening situations.…”