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Updated: Jul 11, 2025

Author Spotlight: A Stable Phantom Material for Optical and Acoustic Imaging

Author Spotlight: A Stable Phantom Material for Optical and Acoustic Imaging

Published on: June 16, 2023

Underwater acoustic sensing using the geometric phase.

Trevor D Lata¹, Pierre A Deymier^1,2, Keith Runge^1,2

¹Department of Materials Science and Engineering, The University of Arizona, Tucson, Arizona 85721, USA.

The Journal of the Acoustical Society of America

|November 7, 2023

Summary

This summary is machine-generated.

This study introduces a novel underwater acoustic sensing method using geometric phase. This technique offers higher sensitivity for detecting subwavelength perturbations compared to traditional magnitude-based measurements.

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Area of Science:

Acoustics
Wave physics
Sensing technologies

Background:

Underwater environments present challenges for acoustic sensing.
Detecting small perturbations requires high-sensitivity methods.
Geometric phase is an underexplored property of acoustic waves for sensing.

Purpose of the Study:

To introduce and validate a novel sensing modality based on acoustic wave geometric phase.
To experimentally investigate the sensitivity of geometric phase sensing to subwavelength perturbations.
To compare the performance of geometric phase sensing with traditional magnitude-based sensing.

Main Methods:

Acoustic waves were propagated in an underwater environment.
The effect of subwavelength perturbations on a submerged surface was studied.
Acoustic field states were represented as multidimensional vectors.
The change in geometric phase was quantified by the angle between state vectors.
Statistical analysis was used to determine signal-to-noise ratio and compare sensing methods.

Main Results:

Geometric phase measurements quantify wave rotation caused by scattering.
A signal-to-noise ratio was defined to assess measurement sensitivity.
Geometric phase sensing demonstrated higher sensitivity than magnitude-based sensing for detecting perturbations.

Conclusions:

Geometric phase sensing is a promising high-sensitivity modality for underwater applications.
This method offers advantages over conventional amplitude-based acoustic sensing.
The technique has potential for detecting small features in submerged environments.