HR: 09:15h
AN: OS41A-06    [PDF]
TI: Development of Ocean Noise "Budgets"
AU: * D'Spain, G L
EM: gld@mpl.ucsd.edu
AF: Marine Physical Lab, Scripps Institution of Oceanography, 291 Rosecrans St., San Diego, CA 92106 United States
AU: Miller, J H
EM: miller@uri.edu
AF: University of Rhode Island, Department of Ocean Engineering, Narragansett Bay Campus, Narragansett, RI 02882 United States
AU: Frisk, G V
EM: gfrisk@whoi.edu
AF: Woods Hole Oceanographic Institution, Mail Stop 11 98 Water Street, Woods Hole, MA 02543 United States
AU: Bradley, D L
EM: dlb25@psu.edu
AF: Applied Research Laboratories, Penn State University, P.O. Box 30, State College, PA 16804 United States
AB: The National Oceanographic Partnership Program recently sponsored the third U.S. National Academy of Sciences study on the potential impact of manmade sound on the marine environment. Several recommendations for future research are made by the 11-member committee in their report titled Ocean Noise and Marine Mammals (National Academies Press, 2003). This presentation will focus on the subset of recommendations related to a "noise budget", i.e., an accounting of the relative contributions of various sources to the ocean noise field. A noise budget is defined in terms of a specific metric of the sound field. The metric, or budget "currency", typically considered is the acoustic pressure spectrum integrated over space and time, which is proportional to the total mechanical energy in the acoustic field. However, this currency may not be the only one of relevance to marine animals. Each of the various ways in which sound can potentially impact these animals, e.g., temporary threshold shift, masking, behavior disruption, etc, probably depends upon a different property, or set of properties, of the sound field. Therefore, a family of noise budgets based on various currencies will be required for complete evaluation of the potential impact of manmade noise on the marine environment. Validation of noise budgets will require sustained, long term measurements of the underwater noise field.
DE: 6620 Science policy
DE: 6699 General or miscellaneous
SC: Ocean Sciences [OS]
MN: 2003 Fall Meeting