In-parallel resonators to increase the absorption of subwavelength acoustic absorbers in the mid-frequency range - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Scientific Reports Année : 2019

In-parallel resonators to increase the absorption of subwavelength acoustic absorbers in the mid-frequency range

(1) , (1)
1

Résumé

The acoustic effects of in-parallel resonators is compared to the behavior of a classical single degree of freedom resonator for which the resistance and the mass are in series. in-parallel resonators serve to enhance the acoustic absorption for mid-frequencies thereby extending the active frequency range of perfect acoustic absorbers. two implementations of these in-parallel absorbers are presented and investigated experimentally as well as numerically. In the first demonstration, the resistance is a perforated plate with a wiremesh and the oscillating mass is the air that fills a tube passing through the plate. The second implementation consists of a thin flexible beam that oscillates and where the resistance is due to the micro-slit resulting from the cutting of the beam.
Fichier principal
Vignette du fichier
s41598-019-47516-7(1).pdf (2.12 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-02336978 , version 1 (29-10-2019)

Identifiants

Citer

Yves Aurégan, Maaz Farooqui. In-parallel resonators to increase the absorption of subwavelength acoustic absorbers in the mid-frequency range. Scientific Reports, 2019, 9 (1), ⟨10.1038/s41598-019-47516-7⟩. ⟨hal-02336978⟩
19 Consultations
39 Téléchargements

Altmetric

Partager

Gmail Facebook Twitter LinkedIn More