Temporary threshold shift and the time pattern of noise exposure
Mots-clés :
acoustic noise, temporary threshold shift, intermittence period, time pattern, on-fraction, sound level, noise bursts, quiet intervals, exchange rate, occupational noise exposure limits, administrative controlRésumé
Le découpage temporel de l'exposition S un bruit intense joue un rôle important dans l'acquisition et la récupération de la fatigue auditive (DTS: décalage temporaire des seuils d'audition). Les facteurs en cause sont la fraction temporelle, la période d'intermittence, le niveau sonore qui prévaut durant les expositions et les pauses. Un examen critique des données scientifiques disponibles de même que la présentation de données originales ont permis de définir les limites dans lesquelles on peut prédire le DTS dans des conditions d'exposition en laboratoire et en usines bruyantes. De cette analyse ont été tirées des implications à l'égard de l'adoption d'un coefficient de pondération durée-intensité dans le contexte des limites d'exposition au bruit en milieu de travail.
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