Manipulation of sonic waves by a quadruple set of Helmholtz resonators
Résumé
This paper examines the coupling effect between Helmholtz resonators (HRs) on mitigating
low-frequency sound, using the finite element model. Previously, we highlighted the physical mechanism behind
double coupled HRs, generating two resonance modes, symmetric and antisymmetric. Such coupling features
can be increased by including four HRs, each containing four openings. This paper aims to simulate quadruple
HRs which result in a significant degeneracy-lifting of the resonances providing new opportunities for sound
monitoring, and controlled by the alteration of units’ separation.