3M Occupational Health & Environmental Safety Division
Acoustical Society of America
Air Conditioning, Heating and Refrigeration Institute
Air Movement Control Association
American Academy of Audiology
American Academy of Otolaryngology, Head and Neck Surgery
American Industrial Hygiene Association
American Speech Language Hearing Assoc
Ariel Corporation
Association of American Railroads
Beltone/GN Resound
BP America
Calnetix
Campanella Associates
Casella USA
Caterpillar
Commercial Vehicle Group
Compressed Air and Gas Institute
Council for Accreditation in Occupational Hearing Conservation
Duke University Dept. of Biomedical Engineering
Eckardt Johanning, M.D.
Emerson Company
Endevco
ETS-Lindgren
Etymotic Research, Inc.
ExxonMobil Research & Engineering
Frye Electronics, Inc.
G.R.A.S. Sound and Vibration
General Electric Aviation
General Electric Power
General Motors
Harley-Davidson Motor Company
Hearing Industries Association
Information Technology Industry Council
Infrared Training Center
Institute of Noise Control Engineering
International Association of Geophysical Contractors
International Council for Machinery Lubrication
International Safety Equipment Association.
John Deere
Mechanical Solutions, Inc.
Machinery Management Open Systems Alliance

NASA Ames Research Center
National Council of Acoustical Consultants
National Hearing Conservation Association
National Institute of Standards and Technology
National Oceanic and Atmospheric Administration
NIST National Voluntary Laboratory Accreditation Program
National Institute for Occupational Safety and Health
National Park Service
Natus Medical, Inc.
NEMA 3SB
Noise Control Engineering
Noise Pollution Clearinghouse
Ocean Conservation Research
PCB Group
Power Tool Institute
Quest Technologies
Scantek
Schenck Trebel Corp
Schomer and Associates
Shock and Vibration Information Analysis Center
Siemens Power Generation, Inc.
Sierra Club - National Parks and Monuments Committee
Sinclair PLLC Occupational & Environmental Legal Consulting
SpeakDolphin.com
Sperian Hearing Protection
Starkey Laboratories
UE Systems
Université du Québec ETS
University of Cincinnati Animal Audiology Clinic/Bioacoustics Lab
U.S. Air Force
U.S. Army Aeromedical Research Lab
U.S. Army Construction Engineering Research Lab
U.S. Army Public Health Command
U.S. Army Research Laboratory - Human Research and Engineering Directorate
U.S. Department of Labor - Mine Safety and Health Administration
U.S. Department of Transportation
U.S. Department of Transportation - Volpe Center
U.S. Food and Drug Administration
U.S. Naval Surface Warfare Center - Carderock
U.S. Naval Surface Warfare Center - Panama City
U.S. Navy Marine Mammal Program
Vibration Institute
V-TEK Associates, LLC
Waukesha Magnetic Bearings