1. Department of Speech, Language and Hearing Sciences, Western Michigan University, Kalamazoo, MI, USA,
2. West Coast Office, Stephenson and Stephenson Research and Consulting, LLC, Forest Grove, OR, USA,
3. Division of Auditory Protection and Performance, U.S. Army Aeromedical Research Laboratory, Fort Rucker, AL, USA, and
4. Hearing Loss Prevention Team, Engineering and Physical Hazards Branch, Division of Applied Research and Technology, National Institute for Occupational Safety and Health, Cincinnati, OH, USA