NRR, ABC OR… [hearing protector selection]

A. Behar, J. Desormeaux


This technical note examines the decision taken by the CSA Standard Committee on Hearing Protectors to continue with the use of the ABC system for the selection of hearing protectors. The basis for the ABC and the NRR systems are reviewed and the systems are compared. The note provides some recommendations regarding the use of the attenuation figures for hearing conservation purposes


hearing; noise abatement; radiation protection; standards; hearing protector selection; CSA Standard Committee on Hearing Protectors; ABC system; NRR systems; attenuation figures; hearing conservation

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