Proceedings of the 54th International Congress and Exposition on Noise Control Engineering

DIFFUSE FIELD SOUND ABSORPTION PERFORMANCE OF POROUS MATERIAL WITH EMBEDDED PERIODIC HELMHOLTZ RESONATORS

Published in 25/09/2025 - ISBN: 978-65-272-1573-8

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Complete Paper Summary
Paper Title
DIFFUSE FIELD SOUND ABSORPTION PERFORMANCE OF POROUS MATERIAL WITH EMBEDDED PERIODIC HELMHOLTZ RESONATORS
Authors
  • Zacharie LALY
  • Christopher Mechefske
  • Sebastian Ghinet
  • Tenon Charly KONE
  • Raymond Panneton
  • Noureddine Atalla
Modality
Online Pre-recorded
Subject area
07.0. Aircraft Noise
Publishing Date
25/09/2025
Country of Publishing
Brazil | Brasil
Language of Publishing
en-US
Paper Page
https://www.even3.com.br/anais/international-congress-exposition-noise-control-engineering/1074286-diffuse-field-sound-absorption-performance-of-porous-material-with-embedded-periodic-helmholtz-resonators
ISBN
978-65-272-1573-8
Keywords
acoustic metamaterial, porous layer, periodic Helmholtz resonators, sound absorption
Summary
This study investigates the diffuse field sound absorption performance of acoustic metamaterial composed of a porous layer with embedded periodic Helmholtz resonators. The periodic unit cell of the metamaterial consists of a porous layer integrated with one, four and nine distinct Helmholtz resonators having extended necks. Although the resonators have cavities of the same volume, they differ in neck parameters and are arranged in parallel. The finite element method is used to evaluate the sound absorption coefficients and the surface impedance of the metamaterial under both oblique and random incidence (diffuse field) conditions. Compared to the conventional porous layer, the metamaterial exhibits significantly enhanced diffuse field sound absorption at the resonant frequencies of the resonators. With one, four and nine embedded periodic resonators, the diffuse field sound absorption shows one, four and nine resonant peaks, respectively. This metamaterial effectively attenuates low-frequency tonal noise across multiple frequencies simultaneously.
Title of the Event
Inter-Noise 2025
City of the Event
São Paulo
Title of the Proceedings of the event
Proceedings of the 54th International Congress and Exposition on Noise Control Engineering
Name of the Publisher
Even3
Means of Dissemination
Meio Digital

How to cite

LALY, Zacharie et al.. DIFFUSE FIELD SOUND ABSORPTION PERFORMANCE OF POROUS MATERIAL WITH EMBEDDED PERIODIC HELMHOLTZ RESONATORS.. In: Proceedings of the 54th International Congress and Exposition on Noise Control Engineering. Anais...Sao Paulo(SP) WTC Events Center, 2025. Available in: https//www.even3.com.br/anais/international-congress-exposition-noise-control-engineering/1074286-DIFFUSE-FIELD-SOUND-ABSORPTION-PERFORMANCE-OF-POROUS-MATERIAL-WITH-EMBEDDED-PERIODIC-HELMHOLTZ-RESONATORS. Access in: 30/01/2026

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