Jackett, R, Piper, B and Hughes, RJ 
ORCID: https://orcid.org/0000-0002-8916-1227
2017,
'Characterization of acoustic diffusion using refracto-vibrometry'
, Journal of Sound and Vibration, 392
, pp. 70-76.
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Abstract
Refracto-vibrometry is a relatively new measurement technique that is sensitive to variations in the optical refractive index of a medium caused by changes in acoustic pressure within that medium (the acousto-optic effect). It has so far been employed primarily as a qualitative visualization tool for airborne sound propagation because determining sound pressure level at a point using the technique is difficult and inefficient. Instead, the authors propose that this optical technique is well suited for determining dimensionless quantities, such as coefficients describing scattering uniformity from a surface. A new measurement and analysis process relying on refracto-vibrometry has been developed and used to determine acoustic diffusion coefficients through purely optical means for the first time. A quadratic residue diffuser is used as an arbitrary test surface, and refracto-vibrometry measurements of its polar response have been performed and results compared to a boundary element model. The benefits and limitations of the optical method over the traditional microphone-based approach are discussed.
| Item Type: | Article |
|---|---|
| Schools: | Schools > School of Computing, Science and Engineering |
| Journal or Publication Title: | Journal of Sound and Vibration |
| Publisher: | Elsevier |
| ISSN: | 0022-460X |
| Related URLs: | |
| Depositing User: | RJ Hughes |
| Date Deposited: | 11 Dec 2019 12:21 |
| Last Modified: | 16 Feb 2022 03:39 |
| URI: | https://usir.salford.ac.uk/id/eprint/53440 |
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