AIHce Indianapolis



RT 203
What Is 85/3, and Why Noise Is More Hazardous Than You Think

Monday | 10:30 a.m.–12:30 p.m. |


Arranger: J. Ratliff, Kanto Corporation, Portland, OR. Moderator: R. Godwin, U.S. Navy, Washington, DC. Monitors: R. Godwin, U.S. Navy, Washington, DC; J. Thomas, NGA Springfield, Springfield, VA.

There is a movement nationally for companies to adopt the concept of an 85 dBA criterion level for 8-hour exposures, and a 3 dB doubling rate.  This session will explore these concepts, which are used worldwide except in the USA, and new research on why noise is more hazardous than you think.  Hearing conservation programs are set up on baseline and annual audiograms, but new research shows that even with no decrement in an audiogram, there can be nerve damage that manifests itself in other ways.  By incorporating the 85/3 concept, the work force will be substantially more protected from occupational noise exposure.

  • What Is the 85/3 Concept? J. Ratliff, Kanto Corporation, Portland, OR.
  • When the Exchange Rate Makes a Difference — Noise Monitoring of Traffic Police in Kathmandu Valley, Nepal. W. Carter,  University of Findlay, Findlay, OH.
  • Adding Insult to Injury: Cochlear Nerve Degeneration After “Temporary” Noise-Induced Hearing Loss. S. Kujawa, Harvard University, Boston, MA.
  • The 85/3 Concept — What We Hope to Accomplish. W. Clark, Washington University, St. Louis, MO.