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Image source detection for geoacoustic inversion by the Teager-Kaiser energy operator.
Achraf Drira1, Laurent Guillon1, Abdel-Ouahab Boudraa1
1Ecole navale, IRENav, BCRM Brest, CC 600, 29240 Brest Cedex 9, France achraf.drira@ecole-navale.fr, guillon@ecole-navale.fr, boudra@ecole-navale.fr.
The Journal of the Acoustical Society of America
|June 9, 2014
Summary
This study enhances geoacoustic inversion using the Teager-Kaiser energy operator for precise signal analysis. The improved method accurately locates image sources, reducing computation time for faster geoacoustic inversion.
Area of Science:
- Oceanography
- Acoustics
- Geophysics
Background:
- Geoacoustic inversion is crucial for understanding the seafloor.
- Traditional methods can be computationally intensive and sensitive to signal characteristics.
Purpose of the Study:
- To improve the image source method for more efficient and accurate geoacoustic inversion.
- To leverage signal discontinuity amplification for enhanced time-of-arrival detection.
Main Methods:
- Utilized the Teager-Kaiser energy operator to process acoustic signals.
- Applied the improved method to both synthetic and real-world geoacoustic data.
- Focused on amplifying signal discontinuities while reducing soft transitions.
Main Results:
- Achieved accurate detection of time arrivals and precise location of image sources.
- Demonstrated good agreement between inversion results and ground truth data.
- Reported a significant reduction in computation time compared to existing methods.
Conclusions:
- The enhanced image source method offers a more efficient approach to geoacoustic inversion.
- The Teager-Kaiser energy operator effectively improves signal analysis for geoacoustic applications.
- This method provides a valuable tool for researchers in marine geophysics and acoustics.
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