Geoacoustic inversion in a range-dependent environment under the assumption of range-independence

Authors

  • Michael G. Morley School of Earth and Ocean Sciences, University of Victoria, Victoria, BC V8W 3P6, Canada
  • Stan E. Dosso School of Earth and Ocean Sciences, University of Victoria, Victoria, BC V8W 3P6, Canada
  • N. Ross Chapman School of Earth and Ocean Sciences, University of Victoria, Victoria, BC V8W 3P6, Canada

Keywords:

Acoustic signal processing, Computation theory, Database systems, Parameter estimation, Speech processing, Computational efficiency, Multiple frequencies, Synthetic datasets

Abstract

The estimation of the geoacoustic properties of the seabed by matched-field inversion (MFI) under the assumption of range-independence is discussed. The assumption of range independence reduces the number of parameters in the problem and significantly improves the computational efficiency of MFI. The degree of random, range dependent variability in water depth and seabed sound speed that can be tolerated are examined by inverting synthetic datasets generated from many unique and random realizations of the environment. The effect on the accuracy of the inversion due to the ignorance of the random variability of individual model parameters was also investigated. The single frequency inversion results are broadly distributed with large biases, which indicate that significant fluctuations of sound speed in the seabed can be effectively averaged over by including multiple frequencies in the inversion.

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Published

2006-09-01

How to Cite

1.
Morley MG, Dosso SE, Chapman NR. Geoacoustic inversion in a range-dependent environment under the assumption of range-independence. Canadian Acoustics [Internet]. 2006 Sep. 1 [cited 2021 Jul. 28];34(3):52-3. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1818

Issue

Section

Proceedings of the Acoustics Week in Canada

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