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Identifying multiply scattered wavepaths in strongly scattering and dispersive media
La Ode Marzujriban Masfara1, Andrew Curtis2, Henrik Rasmus Thomsen3
1Department of Geosciences and Engineering, Technische Universiteit (TU) Delft, Stevinweg 1, Delft 2628 CN, Netherlands.
The Journal of the Acoustical Society of America
|October 2, 2020
Summary
This study applies fingerprinting theory to analyze multiply scattered waves in dispersive media. The automated method successfully estimates arrival times and scattering paths, advancing wave propagation analysis.
Area of Science:
- Wave propagation
- Acoustics
- Seismology
Background:
- Information extraction from scattered waves is often limited to singly scattered energy.
- Higher-order scattered wave events contain underexplored information.
- Previous applications of fingerprinting theory faced challenges with real measurements, especially in dispersive media.
Purpose of the Study:
- To apply fingerprinting theory to analyze multiply scattered waves in a thin, dispersive medium.
- To develop an automated scheme for estimating arrival times and scattering paths of these waves.
- To verify the effectiveness of the developed methods through comparison with numerical modeling and experimental observations.
Main Methods:
- Utilized fingerprinting theory for analyzing multiply scattered waves.
- Implemented an automated scheme with a dispersion compensation method for dispersive media.
- Compared estimated arrival times and paths with predictions based on ray paths.
- Performed numerical modeling to validate data interpretations, including a source scatterer.
Main Results:
- Successfully estimated arrival times and scattering paths of multiply scattered waves in a thin, dispersive medium.
- Initial predictions and numerical results did not align with experimental observations due to the source acting as a scatterer.
- Reformulated theory and processing, incorporating a source scatterer, enabled accurate prediction of all observed scattering events.
Conclusions:
- The developed automated scheme effectively estimates arrival times and scattering paths of multiply scattered waves in dispersive media.
- Accounting for the source as a scatterer is crucial for accurate modeling and prediction.
- The methods are proven effective and practically achievable for analyzing complex wave phenomena.
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