Nonlinear geoacoustic inversion via parallel tempering

Authors

  • Stan E. Dosso School of Earth and Ocean Sciences, University of Victoria, Victoria, BC V8W 3P6, Canada
  • Charles W. Holland Applied Research Laboratory, State College, Pennsylvania 16804-0030, United States

Keywords:

Reverberation, Scattering parameters, Tempering, Acoustic reverberations, Data errors, Geoacoustic inversion, Geoacoustics, Inversion problems, Marginals, Metropolis-Hastings samplings, Multi-modality, Multimodal problems, Parallel tempering, Range-independent, Sediment layers, Standard deviation, Unknown parameters

Abstract

The method of parallel tempering is applied to achieve efficient and effective sampling of a particularly challenging multi-modal problem involving the inversion of acoustic reverberation data for geoacoustic and scattering parameters. Metropolis-Hastings sampling (MHS) and parallel tempering are compared for Bayesian geoacoustic inversion of simulated (noisy) reverberation data. A range-independent seabed model is assumed for the reverberation inversion problem in which the seabed is represented by an upper sediment layer of thickness 5m, sound velocity 1470 m/s, density 1.4 g/cm3, and attenuation 0.5 dB/wavelength. The standard deviation of the data errors 1dB is also considered an unknown parameter in the inversion. Considering the parallel-tempering results, it is found that the multi-modality of the joint marginals are mapped out far better using parallel tempering samples using MHS. There is little practical difference in results for different there is little practical difference in results for different.

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Published

2012-09-01

How to Cite

1.
Dosso SE, Holland CW. Nonlinear geoacoustic inversion via parallel tempering. Canadian Acoustics [Internet]. 2012 Sep. 1 [cited 2021 Nov. 26];40(3):70-1. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2544

Issue

Section

Proceedings of the Acoustics Week in Canada

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