This publication aims to be an informative source on the selection, fitting, use and maintenance of hearing protectors, and to provide data on specific hearing protectors which have been tested by the National Acoustic Laboratories' test facility.
This edition has been expanded to include a limited amount of information on noise definitions, terminology and measurement. This should facilitate the better selection of hearing protectors in the workplace.
The attenuation data presented in this publication relates only to those products that have been tested by NAL in accordance with Australian Standard AS 1270: 1988 Acoustics - Hearing Protectors and with procedures required by the National Association of Testing Authorities. There are many other products on the market with similar characteristics to those tested here. NAL has no intention of implying that the only suitable products are the ones listed in this publication.