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A Stable Phantom Material for Optical and Acoustic Imaging

A Stable Phantom Material for Optical and Acoustic Imaging

Published on: June 16, 2023

Acoustic characterization of panel materials under simulated ocean conditions using a parametric array source.

Victor F Humphrey¹, Stephen P Robinson, John D Smith

¹Institute of Sound and Vibration Research, University of Southampton, Southampton SO17 1BJ, United Kingdom. vh@isvr.soton.ac.uk

The Journal of the Acoustical Society of America

|August 7, 2008

Summary

This study presents a novel laboratory technique for assessing underwater acoustic panel performance. The method utilizes a parametric array to measure reflection and transmission loss under simulated ocean conditions, crucial for naval and marine applications.

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Area of Science:

Acoustics
Materials Science
Ocean Engineering

Background:

Evaluating underwater acoustic performance of materials is critical for naval and marine applications.
Simulating realistic ocean conditions in a laboratory setting presents significant technical challenges.

Purpose of the Study:

To describe and validate a laboratory technique for evaluating the underwater acoustic performance of panels.
To enable measurements of reflection loss and transmission loss under simulated ocean conditions.

Main Methods:

Utilized a parametric array as a sound source within a test vessel simulating ocean depths (up to 700 m) and temperatures (2-35°C).
Employed an acoustic filter to create a source-free measurement region, simplifying the process.
Determined reflection loss and transmission loss at frequencies from a few kHz to 50 kHz.

Main Results:

Successfully validated the technique on test objects with predictable acoustic behavior.
Demonstrated the method's capability by presenting experimental results for test panels under hydrostatic pressures up to 2.8 MPa.
The parametric array facilitated wideband measurements with short pulses, minimizing diffraction effects.

Conclusions:

The described technique provides a reliable method for evaluating underwater acoustic panel performance in a controlled laboratory environment.
The method is suitable for a range of frequencies and hydrostatic pressures relevant to oceanographic applications.
Further research can build upon this technique to explore a wider range of materials and conditions.