The reliability of personal noise dosimeters under steady-state and variable noise exposure
Mots-clés :
acoustic noise measurement, reliability, personal noise dosimeters, steady-state, variable, noise exposure, industrial workers, sound level meter, standard errorRésumé
Trois groupes de 15 travailleurs industriels ont été recrutés en fonction de la configuration temporelle de leur exposition professionnelle au bruit. Il s'agissait a) de bruits stables, b) de bruits dont le niveau subit des variations périodiques et c) de bruits dont îe niveau varie de manière aléatoire. Chaque travailleur a porté un dosimètre individuel durant trois jours consécutifs. L'exposition à long terme a également été évaluée par échantillonnage sonométrique. L'erreur-type de mesure dosiméirique atteignait respectivement ± 1.10, ± 1.56 et ± 2.86 dB pour les trois types d’exposition. Les mesures dosimétriques et sonométriques ont donné le même résultat à 0.5 dB près pour les deux premiers types d'exposition. Un écart moyen de 3.4 dB, en faveur des mesures sonométriques, a été obtenu pour le groupe de travailleurs dont l'exposition était aléatoire.
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