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The mutual scattering cross section
1Applied Physics Laboratory, University of Washington, Seattle, Washington 98105, USA.
The Journal of the Acoustical Society of America
|January 3, 2020
Summary
A new mutual scattering cross section is introduced for sonar applications. This method efficiently models reverberation intensity, including interference effects and backscattering enhancement in complex ocean environments.
Area of Science:
- Acoustics
- Oceanography
- Signal Processing
Background:
- Conventional scattering cross sections have limitations in complex environments.
- Modeling reverberation intensity in ocean waveguides requires advanced approaches.
Purpose of the Study:
- Introduce a generalized mutual scattering cross section for sonar.
- Apply this new method to analyze sea-surface, seafloor scattering, and multipathing effects.
Main Methods:
- Developed a generalized mutual scattering cross section.
- Applied the method to analyze large arrays and multipath environments in ocean waveguides.
- Derived expressions for seafloor roughness and sediment volume scattering.
Main Results:
- The mutual scattering cross section efficiently models reverberation intensity time series.
- It accurately captures interference effects causing oscillations in reverberation.
- Models backscattering enhancement due to multipathing, a phenomenon missed by simpler models.
Conclusions:
- The mutual scattering cross section offers an efficient and physically based approach for sonar modeling.
- It provides a significant advancement over previous ad hoc methods for reverberation analysis.
- The method is applicable to various scattering scenarios, including sea-surface and seafloor interactions.
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