Dell, A., Krynkin, A., Horoshenkov, K. et al. (1 more author) (2023) Low frequency attenuation of acoustic waves in a perforated pipe. The Journal of the Acoustical Society of America, 153 (3). pp. 1791-1801. ISSN 0001-4966
Abstract
This paper presents new experimental and numerical evidence that perforations in a pipe wall result in a low-frequency bandgap within which sound waves rapidly attenuate. These perforations are modelled as an acoustically soft boundary condition on the pipe wall and show that a low frequency bandgap is created from 0 Hz. The upper bound of this bandgap is determined by the dimensions and separation of the perforations. An analytical model based on the transfer matrix method is proposed. This model is validated against numerical predictions for the pipe with varying perforation geometries. A numerical study is undertaken to model the effect of perforations with ideal acoustically soft boundary conditions and surrounded with an air gap. Close agreement is found between the numerical and analytical models. Experimental evidence shows that the width of the bandgap is accurately predicted with the numerical and analytical models.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2023 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Mechanical Engineering (Sheffield) |
Funding Information: | Funder Grant number Engineering and Physical Sciences Research Council 2119233 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 10 Mar 2023 11:01 |
Last Modified: | 24 Mar 2023 14:42 |
Status: | Published |
Publisher: | Acoustical Society of America |
Refereed: | Yes |
Identification Number: | 10.1121/10.0017644 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:197172 |