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Air bubbles in water: a strongly multiple scattering medium for acoustic waves
M Kafesaki1, R S Penciu, E N Economou
1Institute of Electronic Structure and Laser, Foundation for Research and Technology Hellas, P.O. Box 1527, 71110, Heraklion, Crete, Greece.
Physical Review Letters
|September 16, 2000
Summary
Multiple scattering effects create wide transmission gaps for acoustic waves in bubbly water, even with disorder. This finding is crucial for understanding wave propagation in complex media.
Area of Science:
- Acoustics
- Wave Propagation
- Materials Science
Background:
- Bubbly water exhibits complex acoustic properties due to the presence of gas bubbles.
- Understanding wave propagation in disordered media is essential for various applications.
Purpose of the Study:
- To investigate the acoustic band structure and transmission properties of bubbly water.
- To determine the role of multiple scattering in wave propagation within this medium.
Main Methods:
- Development of a novel multiple scattering scheme.
- Calculation of band structure and transmission properties for acoustic waves.
Main Results:
- Demonstration of wide transmission gaps in bubbly water.
- Confirmation that multiple scattering effects are the primary cause of these gaps.
- Observation that gaps persist despite significant positional and size disorder.
Conclusions:
- Multiple scattering is a dominant factor in acoustic wave behavior in bubbly water.
- The developed scheme accurately predicts the formation of transmission gaps.
- Findings have implications for designing acoustic metamaterials and understanding sound propagation in bubbly systems.