Acoustic metamaterial modeling using space-coiling resonators

Resumo

In the last decades the development of metamaterial has motivated new solutions for noise control,
where labyrinthine type absorbers emerged recently. Due to their attracting features, these types of absorbers have
been investigated. The strategy is to bend and coil up quarter-wavelength sound damping tube. The original bulky
volume is decreased into a subwavelength scale, and the absorber with a coiling chamber can produce a high sound
absorption at low frequency. The aim of this paper is to establish reliable analytical and numerical approaches for
the designing and modeling of an effective metamaterial with space-coiling resonators. A duct-resonator acoustic
device is modeled by the Transfer Matrix (TM) and the Finite Element (FE). Simulated examples are performed
and the compared between the methods. The duct-resonator efficiency to attenuate the sound is evaluated.