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Broadband-omnidirectional absorption using inclined wiremesh gratingsa).

Juan Pablo Escudero¹, Jean-Philippe Groby¹, Vincent Pagneux¹

¹Laboratoire d'Acoustique de l'Université du Mans (LAUM), UMR 6613, Institut d'Acoustique - Graduate School (IA-GS), CNRS, Le Mans Université, 72085 Le Mans, FranceJuan_Pablo.Escudero_Lopez@univ-lemans.fr, Jean-Philippe.Groby@univ-lemans.fr, Vincent.Pagneux@univ-lemans.fr.

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Summary

This summary is machine-generated.

This study explores sound-absorbing devices. Researchers found that inclined resistive sheets can create broadband, omnidirectional sound absorption, useful for advanced acoustic applications.

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Area of Science:

Acoustics
Materials Science
Wave Physics

Background:

Acoustic wave reflection is a challenge in many applications.
Designing effective sound-absorbing materials requires understanding wave-structure interactions.
Subwavelength acoustic devices offer miniaturization potential.

Purpose of the Study:

To investigate the acoustic wave reflection properties of a periodic layer of inclined ultrathin resistive sheets.
To achieve strong absorption over a wide range of frequencies and angles of incidence.
To explore design principles for broadband omnidirectional subwavelength sound-absorbing devices.

Main Methods:

Theoretical analysis of acoustic wave reflection.
Numerical simulations of the proposed structure.
Parametric study involving resistivity and inclination angle.

Main Results:

The structure demonstrates strong absorption over a wide frequency range and angles of incidence.
Optimal absorption is achieved with large inclination angles.
Achieved either omnidirectional absorption over a subwavelength band (high resistivity) or broad absorption (medium resistivity).

Conclusions:

The studied structure is effective for broadband and omnidirectional sound absorption.
Inclined ultrathin resistive sheets offer a promising approach for designing compact sound-absorbing devices.
Findings pave the way for advanced acoustic metamaterials and noise control solutions.