Optimal shaping of rectangular acoustic black holes for sound absorption in air
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F23%3A00371528" target="_blank" >RIV/68407700:21230/23:00371528 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.61782/fa.2023.0181" target="_blank" >https://doi.org/10.61782/fa.2023.0181</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.61782/fa.2023.0181" target="_blank" >10.61782/fa.2023.0181</a>
Alternative languages
Result language
angličtina
Original language name
Optimal shaping of rectangular acoustic black holes for sound absorption in air
Original language description
In this work, we examine the performance of rectangular acoustic black holes (ABHs) serving as an anechoic termination in air-filled waveguides. These ABHs, consisting of rigid ribs separated by narrow slits with varying heights, are designed to slow down and absorb impinging acoustic waves. A one-dimensional mathematical model, employing the Riccati equation, is used for the numerical calculations. It accounts for the attenuation of acoustic energy in the thermo-viscous boundary layer through the use of an equivalent fluid model. The accuracy of this simplified, but computationally efficient model is verified by comparing its results to those obtained from a two-dimensional simulation using linearized Navier-Stokes equations and the finite element method. To optimize the ABH profile for maximum acoustic energy absorption, a genetic algorithm is employed in conjunction with the simplified mathematical model. The results demonstrate that the ABHs with an optimized profile exhibit superior performance compared to those with a non-optimized profile, but otherwise the same internal structure.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
10307 - Acoustics
Result continuities
Project
<a href="/en/project/GA22-33896S" target="_blank" >GA22-33896S: Advanced methods of sound and elastic wave field control: acoustic black holes, metamaterials and functionally graded materials</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Forum Acusticum 2023
ISBN
978-88-88942-67-4
ISSN
2221-3767
e-ISSN
2221-3767
Number of pages
6
Pages from-to
4405-4410
Publisher name
European Acoustics Association
Place of publication
Madrid
Event location
Torino
Event date
Sep 11, 2023
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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