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Related Experiment Video

Updated: Apr 12, 2026

Scattering And Absorption of Light in Planetary Regoliths

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

Far-field scattering model for wave propagation in random media.

S I Rokhlin¹, J Li¹, G Sha¹

¹Department of Materials Science and Engineering, Edison Joining Technology Center, The Ohio State University, 1248 Arthur E. Adams Drive, Columbus, Ohio 43221, USA.

The Journal of the Acoustical Society of America

|May 22, 2015

Summary

A new approximate model simplifies ultrasonic wave propagation analysis in random elastic media. This model accurately captures multiple scattering effects across all frequencies, improving upon existing methods.

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Area of Science:

Materials Science
Acoustics
Solid Mechanics

Background:

Ultrasonic wave propagation in random elastic media is complex.
Existing models often struggle with multiple scattering and broad frequency ranges.

Purpose of the Study:

Develop a simplified approximate model for ultrasonic wave propagation.
Incorporate second-order multiple scattering effects.
Ensure applicability across all frequencies.

Main Methods:

Utilized the far-field approximation of the reference medium Green's function.
Simplified the mass operator beyond the first smooth approximation.
Derived a dispersion equation for the perturbed wave number.

Main Results:

Obtained dispersive ultrasonic velocity and attenuation coefficients.
The model is general, suitable for non-equiaxed grains with arbitrary elastic symmetry.
Demonstrated reduced error compared to the Born approximation and captured multiple scattering onset.

Conclusions:

The developed model offers a more accurate and versatile approach to ultrasonic wave propagation analysis.
It provides insights into multiple scattering and the limitations of simpler approximations.
The model's structure facilitates inversion from attenuation to material microstructure.