Liang, Suzi;
Xu, Rui;
Roberts, Morgan;
Cox, Ben;
Treeby, Bradley E;
Martin, Eleanor;
(2025)
Experimental Optimization of a Multiple-Reflection System for Acoustic Material Property Measurement.
Measurement Science and Technology
10.1088/1361-6501/ae1855.
(In press).
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Abstract
Knowledge of the acoustic properties of materials is critical for many applications of acoustics. Common methods for measurement of acoustic material properties include the through transmission substitution-insertion method (SIM), and the multiple-reflection method (MRM). However, the accuracy and uncertainty of MRM measurements have not been evaluated as widely as for SIM. This study investigates the impact of system compressional force, buffer rod diameter, and buffer rod and specimen surface conditions on accuracy and repeatability of MRM measurements of attenuation coefficient and longitudinal sound velocity of 3D printed specimens, validated against SIM measurements. Measurement accuracy and repeatability improved as system compression was increased, with attenuation coefficients measured by SIM and MRM at 0.5 MHz converging to within 0.1 dB/cm (1.6 ± 0.1 dB/cm vs 1.7 ± 0.2 dB/cm) for the RGDA8625 material. A buffer rod of at least twice the diameter of the transducer was required for agreement between the two methods, differences of >40% were measured with narrower buffer rods. The buffer rod and specimen should be sufficiently flat and well-polished to minimise errors. These findings may guide future system design and optimisation, and suggest that experimental convergence should be verified on setup. This may aid the standardisation of measurement protocols, helping to improve accuracy and repeatability of acoustic material property measurements.
| Type: | Article |
|---|---|
| Title: | Experimental Optimization of a Multiple-Reflection System for Acoustic Material Property Measurement |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/1361-6501/ae1855 |
| Publisher version: | https://doi.org/10.1088/1361-6501/ae1855 |
| Language: | English |
| Additional information: | As the Version of Record of this article is going to be / has been published on a gold open access basis under a CC BY 4.0 licence, this Accepted Manuscript is available for reuse under a CC BY 4.0 licence immediately. Everyone is permitted to use all or part of the original content in this article, provided that they adhere to all the terms of the licence https://creativecommons.org/licences/by/4.0 Although reasonable endeavours have been taken to obtain all necessary permissions from third parties to include their copyrighted content within this article, their full citation and copyright line may not be present in this Accepted Manuscript version. Before using any content from this article, please refer to the Version of Record on IOPscience once published for full citation and copyright details, as permissions may be required. All third party content is fully copyright protected and is not published on a gold open access basis under a CC BY licence, unless that is specifically stated in the figure caption in the Version of Record. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10216634 |
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