Enhanced resonance of sparse arrays of Helmholtz resonators—Application to perfect absorption | Zendy

Agnès Maurel | Zendy; JeanFrançois Mercier | Zendy; Kim Pham | Zendy; JeanJacques Marigo | Zendy; Abdelwaheb Ourir | Zendy

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Enhanced resonance of sparse arrays of Helmholtz resonators—Application to perfect absorption

Author(s) -

Agnès Maurel,

JeanFrançois Mercier,

Kim Pham,

JeanJacques Marigo,

Abdelwaheb Ourir

Publication year - 2019

Publication title -

the journal of the acoustical society of america

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.619

H-Index - 187

eISSN - 1520-8524

pISSN - 0001-4966

DOI - 10.1121/1.5098948

Subject(s) - resonator , resonance (particle physics) , helmholtz resonator , acoustics , helmholtz free energy , absorption (acoustics) , range (aeronautics) , electrical impedance , physics , degrees of freedom (physics and chemistry) , materials science , computational physics , optics , atomic physics , quantum mechanics , composite material

The influence of the spacing on the resonance of a periodic arrangement of Helmholtz resonators is inspected. An effective problem is used which accurately captures the properties of the resonant array within a large range of frequencies, and whose simplified version leaves an impedance condition. It is shown that the strength of the resonance is enhanced when the array becomes sparser. This degree of freedom on the radiative damping is of particular interest since it does not affect the resonance frequency nor the damping due to losses within each resonator; in addition, it does not affect the total thickness of the array. It is shown that it can be used for the design of a perfect absorbing wall.

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