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Open Access Acoustic Performance of a Barrier Embedded With Helmholtz Resonators Using a Quasi-Periodic Boundary Element Technique

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Barriers are widely used to attenuate environmental noise from vehicles to residential areas. This paper numerically explores the acoustic performance of a barrier for tailored low frequency noise reduction using a quasiperiodic boundary element method, whereby the barrier is represented by a finite number of periodic sections along its length. Results for the insertion loss of a barrier with single and multiple Helmholtz resonators embedded along the top edge of each periodic barrier section and tuned to different frequencies are compared to results for an equivalent straight barrier in the absence of the Helmholtz resonators. The acoustic performance of the noise barrier with and without the embedded Helmholtz resonators is also examined for elevated traffic noise sources typically corresponding to engine and exhaust noise of light and heavy vehicles. Diff raction over the top edge of the barrier and reflections from the ground on both the source and receiver sides of the barrier are taken into account.

© 2017 The Author(s). Published by S. Hirzel Verlag · EAA. This is an open access article under the terms of the Creative Commons Attribution (CC BY 4.0) license (https://creativecommons.org/licenses/by/4.0/).

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Document Type: Research Article

Publication date: May 1, 2017

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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