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Updated: Feb 22, 2026

Scattering And Absorption of Light in Planetary Regoliths

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

Spherical wave scattering from rough surfaces and array processing: Application to sound-speed profile measurement

Samuel Pinson¹

¹SHOM, Brest Cedex 2, France.

The Journal of the Acoustical Society of America

|October 2, 2017

Summary

Roughness on sediment layers significantly impacts sound-speed profile measurements. This study quantifies this influence using 3D modeling and wave reflection analysis, revealing its surprising strength.

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Area of Science:

Geophysics
Acoustics
Oceanography

Background:

Sediment sound-speed profiles are crucial for underwater acoustics.
Interface roughness can introduce uncertainties in acoustic measurements.
Accurate sound-speed profiling is essential for sonar and seismic imaging.

Purpose of the Study:

To investigate the influence of interface roughness on sediment sound-speed profile measurements.
To quantify the impact of roughness on wave reflection parameters.
To compare theoretical predictions with numerical simulations.

Main Methods:

Utilizing three-dimensional modeling of spherical wave reflection.
Employing a point source and hydrophone array configuration.
Deriving theoretical uncertainties using the Helmholtz-Kirchhoff integral with array processing.

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Main Results:

Numerical experiments demonstrate a strong influence of interface roughness on sound-speed measurements.
Theoretical uncertainties in angle of arrival and travel time were quantified.
Good agreement was found between theoretical derivations and numerical simulations.

Conclusions:

Sediment interface roughness significantly affects sound-speed profile measurements.
The study validates the use of 3D modeling for analyzing roughness effects.
Findings highlight the need to account for interface roughness in acoustic inversions.