Next Article in Journal
Microbial Biopolymers: From Production to Environmental Applications—A Review
Previous Article in Journal
A Bilevel Optimization Approach for Tuning a Neuro-Fuzzy Controller
Previous Article in Special Issue
Improving Low-Frequency Panel Absorbers with Two-Dimensional Acoustic Black Hole
 
 
Font Type:
Arial Georgia Verdana
Font Size:
Aa Aa Aa
Line Spacing:
Column Width:
Background:
This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Resonant Acoustic Metamaterials

1
Department of Architecture and Industrial Design, University of Campania “Luigi Vanvitelli”, 81031 Aversa, Italy
2
SCS-ControlSys—Vibro-Acoustic, 35011 Padova, Italy
3
Department of Architecture and Engineering, University of Parma, 43124 Parma, Italy
4
Energy Department, Politecnico di Milano, 20133 Milano, Italy
*
Author to whom correspondence should be addressed.
Appl. Sci. 2024, 14(12), 5080; https://doi.org/10.3390/app14125080
Submission received: 9 May 2024 / Revised: 2 June 2024 / Accepted: 8 June 2024 / Published: 11 June 2024

Abstract

Acoustic applications of metamaterials have rapidly developed over the past few decades. The sound attenuation provided by metamaterials is due to the interaction between soundwaves and scatterers organized into a reticular grid, with a peak attenuation at a specific frequency band that is highly dependent on the scatterers’ diameter and reticular geometric organization of installation. In this article, the scatterer types chosen for the experiments are represented by a 2D shape, which are cylindrical solid-wood bars of 15 mm diameter and empty cylindrical bars of 20 mm diameter. Acoustic measurements were conducted in a semi-anechoic chamber to identify the specific frequency at which the highest insertion loss (IL) was registered. A second experiment was conducted by creating holes of 5 mm diameter on the external surface of the empty bars; in this way, it registered a higher sound attenuation. In particular, the resonant system characterized with holes, in combination with the attenuation given by 2D scatterer metamaterials, increased the sound attenuation for the frequency range between 1 kHz and 10 kHz.
Keywords: metamaterials; insertion loss; scale model; noise attenuation; diffraction; 2D scatterers metamaterials; insertion loss; scale model; noise attenuation; diffraction; 2D scatterers

Share and Cite

MDPI and ACS Style

Iannace, G.; Amadasi, G.; Bevilacqua, A.; Cairoli, M.; Trematerra, A. Resonant Acoustic Metamaterials. Appl. Sci. 2024, 14, 5080. https://doi.org/10.3390/app14125080

AMA Style

Iannace G, Amadasi G, Bevilacqua A, Cairoli M, Trematerra A. Resonant Acoustic Metamaterials. Applied Sciences. 2024; 14(12):5080. https://doi.org/10.3390/app14125080

Chicago/Turabian Style

Iannace, Gino, Giovanni Amadasi, Antonella Bevilacqua, Maria Cairoli, and Amelia Trematerra. 2024. "Resonant Acoustic Metamaterials" Applied Sciences 14, no. 12: 5080. https://doi.org/10.3390/app14125080

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

Article Metrics

Back to TopTop