Letters to the Editor: 6-kHz notch in noise-induced hearing loss
Mots-clés :
acoustic noise, biological effects of acoustic radiation, hearing, noise-induced hearing loss, industrial noise, audiograms, presbycusisRésumé
Les audiogrammes de 49 711 travailleurs qui étaient exposés aux bruits industriels de plus de 85 dB(A) étaient analysés par genre et par age. Cette population de travailleurs n'avait aucune patholgie de l'oreille évidente. Le résultat était que la configuration de la moyenne des audiogrammes indique un 'notch' à 6 kHz au lieu d'un à 4 kHz comme il y était rapporté par les récherches précédentes. Quand la moyenne des audiogrammes était corrigée pour 'le presbycusis', le 'notch' se déplaçait de 6 kHz à 4 kHz seulement pour les groupes de personnes âgées de plus de quarante-cinq ans. Les raisons pour la différence entre les résultats des recherches précédentes et de cette récherche sont examinées.
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