Manipulation of extraordinary acoustic transmission using cascaded both-sides-open disk resonator array

Y L Lee,M S Chang,Y P Tsai,K H Wei,W S Chang,F L Hsiao,C T Chiang,C C Chiu,Y Y Wang

doi:10.1063/5.0020549

Y L Lee, M S Chang + Show 7 more

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https://doi.org/10.1063/5.0020549

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Journal: AIP Advances	Publication Date: Aug 1, 2020
Citations: 2	License type: cc-by

Affiliation: National Changhua University of Education

Abstract

Extraordinary acoustic transmission (EAT) through cascaded both-sides-open disk resonators (BSODRs) in a square lattice array (SLA) is investigated. A single BSODR consists of one disk cavity that is sandwiched by two tubes. These structures are realized by stacking perforated steel plates and immersing them in water. EAT is studied through single-layer, two-layer, three-layer, and four-layer BSODRs in SLAs. The EAT orders increase with increasing numbers of cascading layers. The quality factors of the highest order EAT peaks also increase with increasing numbers of cascading layers. The EAT characteristics of each structure can be predicted using a spring–mass model. A coupled spring–mass model with two oscillators is proposed. The vibration of the steel part is considered one oscillator and that of the water part of the BSODR represents the other oscillator. The model verifies that the EAT resonances are excited by coupling of the vibration from the steel plates to the water part. The experimental transmission spectra agree with the numerically simulated spectra. The EAT frequency is sensitive to the longitudinal sound velocity. Because of the increased quality factor, the figure of merit is enhanced eight times by cascading four BSODR layers. The proposed structure is suitable for acoustic filter and sensor applications.

Highlights

Acoustic metamaterials are artificial materials that have unusual properties, such as a negative bulk modulus1,2 or a negative effective density.3–5 These materials can provide novel approaches to manipulation of acoustic waves
We have investigated extraordinary acoustic transmission (EAT) phenomena in cascaded both-sides-open disk resonators (BSODRs) in an square lattice array (SLA)
The single BSODR consists of one cavity and two tubes, where one tube is on the top of the cavity and the other tube is on the bottom

Summary

Introduction

Acoustic metamaterials are artificial materials that have unusual properties, such as a negative bulk modulus or a negative effective density. These materials can provide novel approaches to manipulation of acoustic waves. Acoustic metamaterials are artificial materials that have unusual properties, such as a negative bulk modulus or a negative effective density.. Acoustic metamaterials are artificial materials that have unusual properties, such as a negative bulk modulus or a negative effective density.3–5 These materials can provide novel approaches to manipulation of acoustic waves. Many researchers have used acoustic metamaterials to achieve extraordinary acoustic transmission (EAT), sound-proof structures, acoustic negative refraction behavior, and acoustic lenses.. Molerón et al. demonstrated an acoustic Fresnel lens with EAT based on a metamaterial. Jiménez et al. demonstrated perfect and quasi-omnidirectional sound absorption using an ultra-thin metamaterial composed of periodic closed slits with Helmholtz resonators (HRs). Zhang et al. demonstrated EAT that was generated using a metasurface based on an array of coupled Mie resonators

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