Single-hydrophone Bayesian matched-field geoacoustic inversiona).

Area of Science:

• Ocean acoustics
• Geophysical inversion
• Signal processing

Background:

• Traditional geoacoustic inversion often requires multiple hydrophones.
• Efficient computation of posterior distributions is crucial for complex inversions.
• Single-hydrophone systems offer advantages in specific operational scenarios.

Purpose of the Study:

• To present Bayesian matched-field geoacoustic inversion results using data from a single hydrophone.
• To demonstrate an adaptive Metropolis-Hastings sampling strategy for efficient posterior computation.
• To validate the method's accuracy using experimental data.

Main Methods:

• Bayesian matched-field geoacoustic inversion.
• Adaptive Metropolis-Hastings sampling for efficient posterior distribution computation.
• Application to the Shallow Water 2006 experimental dataset with two broadband acoustic sources.

Main Results:

• Accurate estimation of key geoacoustic parameters: source range, source depth, water depth, and sediment compressional sound speed.
• Successful application of the single-hydrophone inversion technique to experimental data.
• Demonstration of the adaptive sampling strategy's efficiency.

Conclusions:

• Bayesian single-hydrophone geoacoustic inversion provides accurate parameter estimates.
• The method is particularly useful in resource-limited or rapid-deployment scenarios.
• This approach enhances the feasibility of acoustic inversion in challenging environments.