Validation of a Vibroacoustic Finite Element Model Using Bottlenose Dolphin Experiments
Our understanding of potential impacts of anthropogenic sounds needs to grow so that environmental consequences of ocean noise levels may be evaluated. Experimentally exposing animals is expensive and often impractical or unethical, and thus simulation is among the most promising approaches, especially finite element modeling (FEM). FEM techniques have been successfully used in the area of bioacoustics of marine animals, e.g., the sonar anatomy and acoustic pathways for Cuvier’s beaked whale (Cranford et al. 2008). This animal is at the forefront of concerns about the potential impacts from Navy sonar. An obvious problem in working with this species is that we know so little about it. Neither do we have sufficient experimental observations against which to assess the validity of the simulation results. The work described here remedies that situation by validating our simulation framework using some of the experimental results available for the bottlenose dolphin.
KeywordsSound Source Sound Generation Bottlenose Dolphin Compressible Fluid Directivity Index
We acknowledge the support of Dr. Frank Stone and Dr. Ernie Young, Chief of Naval Operations Environmental Readiness Division, Washington, DC; Dr. Curtis Collins, Naval Postgraduate School, Monterey, CA; and Dr. Michael Weise and Dr. James Eckman, Office of Naval Research, Arlington, VA. The live dolphin CT scan dataset was provided by the US Navy Marine Mammal Program, San Diego, CA.We also thank John Hildebrand, Scripps Institution of Oceanography, La Jolla, CA, for his contribution to this work and Dr. Robert Gisiner, currently with the Marine Mammal Commission, Bethesda, MD.
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