OSHA Safety and Health Topic: Occupational Noise Exposure https://www.osha.gov/SLTC/noisehearingconservation/ Includes information on occupational noise, OHL prevention, current regulations and components of a hearing conservation program.
National Hearing Conservation Association (NHCA) http://www.hearingconservation.org/ A private organization of audiologists, industrial hygienists, engineers, and others with a mission to prevent hearing loss due to environmental factors such as noise.
Council for Accreditation in Occupational Hearing Conservation (CAOHC) http://www.caohc.org/index.php A council comprised of representatives from health organizations with an objective to prevent OHL by providing education and guidance on the successful implementation of an occupational hearing conservation program.
NIOSH Hearing Protector Device Compendium http://www.cdc.gov/niosh/topics/noise/hpdcomp/ A database containing information on commercial hearing protector device features to aid in selection of protectors for specific situations.
North American Industry Classification System (NAICS) http://www.census.gov/eos/www/naics/ The standard system used by Federal statistical agencies in classifying business establishments related to the U.S. business economy.