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ID (ISN) del documento109244
Número CIS 09-179
ISSN - Título de la serie 0007-9952 - Cahiers de notes documentaires - Hygiène et sécurité du travail
Año 2008
Número de serie INRS ND 2295-212-08
Autor(es) Kusy A.
Título In-situ attenuation of hearing protection devices - Literature survey
Título original Affaiblissement acoustique in situ des protecteurs individuels contre le bruit - Étude bibliographique [en francés]
Información bibliográfica 3rd Quarter 2008, No.212, p.-43-59. Illus. 60 ref.
Acceso Internet$File/nd2295.pdf [en francés]
Resumen Directive 2003/10/EC (see CIS 06-253) has modified European regulations on protecting workers against noise exposure. This directive specifically introduces a new requirement in the form of exposure limit values, the level of daily noise exposure being henceforth limited to 87dB(A) and peak sound pressure level to 140dB(C), including attenuation of hearing protectors. Exposure level determination requires knowing both the sound pressure spectrum for the exposure noise and the noise attenuation values of hearing protection devices (HPD) based on their field estimation. These constraints lead to difficulties of both metrological and methodological nature. The aim of this literature survey was to establish the current state of the art in relation to the real capacity of HPD to attenuate noises. Testing methods applied to determining HPD noise attenuation are described. The survey reveals a major difference between attenuation values declared in HPD manufacturers' specifications and real attenuation values measured in situ. Moreover, this difference varies, depending on the HPD type, ranging from 5dB for safety helmet-mounted ear-muff types to nearly 22dB for formable foam ear-plug types. There are insufficient data on custom-moulded ear-plug type and additional investigations are required in this area.
Descriptores (primarios) protección del oído; atenuación del ruido; limitación de la exposición
Descriptores (secundarios) revisión bibliográfica; valores umbrales; Unión Europea; protector de tímpanos; comentario de norma; dosimetría del ruido; pruebas del material; comentario de directiva; conchas antiruido
Tipo de documento D - Artículos periódicos
País / Estado o ProvinciaFrancia
Tema(s) Ruido, audición, vibraciones
Broad subject area(s) Riesgos físicos
Navegación por categoria(s) Noise
Hearing protection