Optimal shaping of acoustic black holes for sound absorption in air

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F24%3A00375444" target="_blank" >RIV/68407700:21230/24:00375444 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1051/aacus/2024014" target="_blank" >https://doi.org/10.1051/aacus/2024014</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/aacus/2024014" target="_blank" >10.1051/aacus/2024014</a>

Result language

angličtina

Original language name

Optimal shaping of acoustic black holes for sound absorption in air

Original language description

This article presents a systematic numerical study of the absorbing properties of acoustic black holes (ABHs) serving as an anechoic termination of waveguides. The study focuses on the sensitivity of ABHs' absorbing performance to their profile and internal-structure parameters. The article compares numerical predictions from 1D model based on the Riccati equation with a detailed 2D model based on the linearized Navier-Stokes equations and the finite element method, finding good agreement among all results, especially for ABHs with fine internal structures. The mean value of the reflection coefficient modulus is used to quantify the ABH's absorbing performance, and the article introduces the use of power-law functions and cubic splines to define the ABH's shape function. An evolutionary algorithm is employed to optimize the ABH's profile, resulting in improved absorbing performance. The numerical results suggest that the optimum shape is simple and more-or-less insensitive to other geometrical and internal-structure parameters.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10307 - Acoustics

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)

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Acta Acustica

ISSN

2681-4617

e-ISSN

2681-4617

Volume of the periodical

8

Issue of the periodical within the volume

21

Country of publishing house

FR - FRANCE

Number of pages

11

Pages from-to

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UT code for WoS article

001241607800001

EID of the result in the Scopus database

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