ACKNOWLEDGMENT

The present edition has incorporated much of the philosophical guidance and content that were part of the original version. The editors offer a special thanks to Dr. Thais Morata for contributing segments to the present edition that discuss occupational exposure to chemicals. The editors would also like to thank those who thoughtfully reviewed draft versions.

REVIEWERS OF THE PRESENT EDITION

NIOSH Staff:

Derek Dunn, William Murphy, Curt Sizemore, Randy L. Tubbs, Thais Morata*, Terry Begines**,
Carolyn Bennett***

Extramural:

NIOSH Staff: Derek Dunn Randy L. Tubbs Carolyn Bennett***	William Murphy Thais Morata*	Curt Sizemore Terry Begines**
Extramural: Elliott Berger Cabot Safety Corporation 7911 Zionsville Road Indianapolis, IN 46268-1657	John Casali Virginia PolyTech & State University Auditory Systems Laboratory Blacksburg, VA 24061	Dennis Driscoll Associates in Acoustics ,Inc. 718 Aspen Place Evergreen, CO 80439
Donald Gasaway Cabot Safety Corporation 4306 Springview San Antonio, TX 78222	William Melnick Consultant 1635 Barrington Road Columbus, OH 43221	Julia Royster Environmental Noise Consultants P. O. Box 30698 Raleigh, NC 27622-0698
Theresa Schulz U.S. Air Force AL/AOCFO 2507 Kennedy Drive Brooks AFB, TX 78245-5117	Thomas Simpson Wayne State University Department of Audiology 5E University Health Center 4201 St. Antoine Street Detroit, MI 48201

We also want to thank Mr. Richard A. Carlson for creating many of the illustrations, and Mr. Douglas Rohrer and Ms. Connie Jo Wilson for managing this document as it was moved through the review and clearance process. Finally, our thanks go to Mr. Curt Sizemore who designed the cover.

John R. Franks,Ph.D.

Chief
Bioacoustics and Occupational
Vibration Section
Physical Agents Effects Branch
Division of Biomedical and
Behavioral Science
National Institute for Occupational
Safety and Health

Mark R. Stephenson, Ph.D.

Research Audiologist
Bioacoustics and Occupational
Vibration Section
Physical Agents Effects Branch
Division of Biomedical and
Behavioral Science
National Institute for Occupational
Safety and Health

Carol J. Merry, Ph.D.

Research Psychologist
Bioacoustics and Occupational
Vibration Section
Physical Agents Effects Branch
Division of Biomedical and
Behavioral Science
National Institute for Occupational
Safety and Health

* Dr. Morata is currently assigned to NIOSH as an National Research Council Research Fellow.

** Capt. Begines was assigned to NIOSH as an Air Force Institute of Technology Research Fellow and presently is assigned to Robins Air Force Base, Georgia.

*** Major Bennett is assigned to NIOSH as an Air Force Institute of Technology Research Fellow

Last Updated July 15, 1999

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