TY - GEN
T1 - Broadband noise mitigation using coupled Helmholtz resonators
T2 - 50th International Congress and Exposition of Noise Control Engineering, INTER-NOISE 2021
AU - Krasikova, Mariia
AU - Melnikov, Anton
AU - Krasikov, Sergey
AU - Baloshin, Yuri
AU - Slobozhanyuk, Alexey
AU - Marburg, Steffen
AU - Powell, David
AU - Bogdanov, Andrey
N1 - Publisher Copyright:
© INTER-NOISE 2021 .All right reserved.
PY - 2021
Y1 - 2021
N2 - In this work, we investigate a two-dimensional periodic structure in the frequency range from 20 Hz to 5500 Hz designed for broadband noise insulation. The considered unit cell consists of a pair of polymer pipes with slits carved along the axes, representing two coupled Helmholtz resonators. It is demonstrated that tuning of geometric parameters of the resonators results in opening of large band-gaps, such that the total width of complete band-gaps may exceed 50 % of the spectrum and the total width of ΓX band-gaps may be approximately 80 %. Eigenmodes of the system are analyzed in terms of their symmetry and interaction with each other. Results for the infinite two-dimensional structure are compared with numerically determined transmission coefficient of a semi-infinite structure with the same unit cell. The number of unit cells of the semi-infinite structure is chosen to be sufficient for demonstration of stop-bands corresponding to ΓX band-gaps of the infinite structure. Furthermore, we analyze how the transmission coefficient is linked to the pressure field distribution inside the resonators. Owing to the simplicity of the geometry, the obtained results may become a basis for development of budget-friendly passive systems for broadband noise insulation within the audible range of frequencies.
AB - In this work, we investigate a two-dimensional periodic structure in the frequency range from 20 Hz to 5500 Hz designed for broadband noise insulation. The considered unit cell consists of a pair of polymer pipes with slits carved along the axes, representing two coupled Helmholtz resonators. It is demonstrated that tuning of geometric parameters of the resonators results in opening of large band-gaps, such that the total width of complete band-gaps may exceed 50 % of the spectrum and the total width of ΓX band-gaps may be approximately 80 %. Eigenmodes of the system are analyzed in terms of their symmetry and interaction with each other. Results for the infinite two-dimensional structure are compared with numerically determined transmission coefficient of a semi-infinite structure with the same unit cell. The number of unit cells of the semi-infinite structure is chosen to be sufficient for demonstration of stop-bands corresponding to ΓX band-gaps of the infinite structure. Furthermore, we analyze how the transmission coefficient is linked to the pressure field distribution inside the resonators. Owing to the simplicity of the geometry, the obtained results may become a basis for development of budget-friendly passive systems for broadband noise insulation within the audible range of frequencies.
UR - http://www.scopus.com/inward/record.url?scp=85117408410&partnerID=8YFLogxK
U2 - 10.3397/IN-2021-2573
DO - 10.3397/IN-2021-2573
M3 - Conference contribution
AN - SCOPUS:85117408410
T3 - Proceedings of INTER-NOISE 2021 - 2021 International Congress and Exposition of Noise Control Engineering
BT - Proceedings of INTER-NOISE 2021 - 2021 International Congress and Exposition of Noise Control Engineering
A2 - Dare, Tyler
A2 - Bolton, Stuart
A2 - Davies, Patricia
A2 - Xue, Yutong
A2 - Ebbitt, Gordon
PB - The Institute of Noise Control Engineering of the USA, Inc.
Y2 - 1 August 2021 through 5 August 2021
ER -