| Título: | Noise exposure group surveys - Number of days to sample |
| Autores: | Behar, Alberto; IBBME, University of Toronto, 4 Taddle Creeg Rd., Toronto, Ont. M5S 3G9, Canada |
| Fecha: | 2005-06-01 |
| Publicador: | Canadian Acoustical Association / Association canadienne d'acoustique |
| Fuente: |
Ver documento |
| Tipo: |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
| Tema: |
Surveying Acoustic noise; Personnel; Probability density function; Sampling; Students; Testing; Group surveys; Noise exposure; Sample sizes; Workers |
| Descripción: |
A study to determine the number of noise exposure measurements days required to be performed on a group of workers, so as to obtain reliable results was conducted. In all 13 groups from two different sites were involved, with sample sizes ranging from 3 to 24 employees (average 12.5). Surveys were performed for four consecutive days. The reports from the surveys included the results from each one of the four days of testing (LTTrade,8) and of the corresponding LTrade,32. The daily LTrade,8 were compared with the corresponding LTrade,32, using the Student's t-Test. Results show that for the samples being tested, there were no significant differences in 88.5% of the cases. It was concluded that one day of testing is probably sufficient. However, because of the difficulty in determining a "typical" day, it is recommended that testing be performed for two days. Cette étude a été conduite afin de determiner combien de jours sont nécessaires pour obtenir des résultats fiables lors de la mesure à l’exposition au bruit d’un groupe de travailleurs. En tout, 13 groupes provenant de deux différents sites ont été étudiés. L’échantillonnage variait entre trois et 24 employés avec une moyenne de 12.5 employés. On a mesuré l’exposition au bruit pendant quatre jours consécutifs. Le rapport inclus les résultats quotidiens obtenus (LTrade8) et le Lprade32 correspondant, en utilisant le Student’s t-Test. Les résultats obtenus avec l’échantillonnage testé ont démontré qu’il n’existait pas de différences significatives dans 88,5% des cas. On a donc conclu qu’une journée de test est suffisant. Par contre, puisqu’il est difficile d’identifier une « journée-type », il est recommandé d’effectuer des mesures pendant deux jours. |
| Idioma: | Inglés |
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