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On acoustic scattering by a shell-covered seafloor
1Woods Hole Oceanographic Institution, Massachusetts 02543, USA.
The Journal of the Acoustical Society of America
|August 24, 2000
Summary
Seafloor acoustic scattering at high frequencies is mainly determined by the material properties and packing density of shells, not their size or frequency. This finding simplifies predicting seafloor sound reflection.
Area of Science:
- Acoustics
- Oceanography
- Marine Biology
Background:
- Seafloor acoustic scattering is significantly influenced by discrete objects like shells.
- Previous research measured target strength of shelled animals and performed scattering modeling.
Purpose of the Study:
- To estimate seafloor acoustic scattering with shell coverings at high frequencies.
- To develop a formulation for area scattering strength based on scatterer properties.
Main Methods:
- Utilized results from target strength measurements of shelled animals.
- Derived a formulation for area scattering strength.
- Incorporated scatterer material properties and packing factor.
Main Results:
- A formula was derived expressing area scattering strength.
- Backscattering depends primarily on material properties and packing factor, independent of size/frequency.
- Estimates align with observed shell-covered seafloor scattering strengths.
Conclusions:
- The derived formula provides a simplified model for high-frequency seafloor scattering.
- Material properties and packing factor are key determinants of seafloor acoustic scattering by shells.
- Findings are consistent with existing observations of shell-covered seafloor acoustics.