TY - JOUR
T1 - Coupled Resonators for Sound Trapping and Absorption
AU - Al Jahdali, Rasha
AU - Wu, Ying
N1 - KAUST Repository Item: Exported on 2021-02-19
Acknowledged KAUST grant number(s): OSR-2016-CRG5-2950, BAS/1/1626-01-01
Acknowledgements: The authors would like to thank Lixin Ge for discussions. This publication is based upon work supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No. OSR-2016-CRG5-2950 and Baseline Research Fund BAS/1/1626-01-01.
PY - 2018/9/14
Y1 - 2018/9/14
N2 - The leakage of sound waves in a resonance based rainbow trapping device prevents the sound wave being trapped in a specific location. In this study, we report a design of sound trapping device based on coupled Helmholtz resonators, loaded to an air waveguide, which can effectively tackle the wave leakage issue. We show that coupled resonators structure can generate dips in the transmission spectrum by an analytical model derived from Newton’s second law and numerical analysis based on finite-element method. An effective medium theory is derived, which shows that coupled resonators cause a negative effective bulk modulus near the resonance frequency and induce flat bands that give rise to the confinement of the incoming wave inside the resonators. We compute the transmission spectra and band diagram from the effective medium theory, which are consistent with the simulation results. Trapping and high absorption of sound wave energy are demonstrated with our designed device.
AB - The leakage of sound waves in a resonance based rainbow trapping device prevents the sound wave being trapped in a specific location. In this study, we report a design of sound trapping device based on coupled Helmholtz resonators, loaded to an air waveguide, which can effectively tackle the wave leakage issue. We show that coupled resonators structure can generate dips in the transmission spectrum by an analytical model derived from Newton’s second law and numerical analysis based on finite-element method. An effective medium theory is derived, which shows that coupled resonators cause a negative effective bulk modulus near the resonance frequency and induce flat bands that give rise to the confinement of the incoming wave inside the resonators. We compute the transmission spectra and band diagram from the effective medium theory, which are consistent with the simulation results. Trapping and high absorption of sound wave energy are demonstrated with our designed device.
UR - http://hdl.handle.net/10754/628725
UR - https://www.nature.com/articles/s41598-018-32135-5
UR - http://www.scopus.com/inward/record.url?scp=85053295593&partnerID=8YFLogxK
U2 - 10.1038/s41598-018-32135-5
DO - 10.1038/s41598-018-32135-5
M3 - Article
C2 - 30218005
AN - SCOPUS:85053295593
VL - 8
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
IS - 1
ER -