TY - GEN
T1 - Sound absorption based on micro-perforated panels and acoustic black hole principle
AU - Zhang, Xiaoqi
AU - Cheng, Li
N1 - Funding Information:
The research reported here was supported by “the Fundamental Research Funds for the Central Universities (WUT: 2021IVA026)”.
Publisher Copyright:
© INTER-NOISE 2021 .All right reserved.
PY - 2021/8
Y1 - 2021/8
N2 - Acoustic black holes (ABHs) have been so far investigated mainly for bending wave manipulation in mechanical structures such as beams or plates. The investigations on ABHs for sound wave manipulation, referred to as Sonic black holes (SBHs) are scarce. Existing SBH structures for sound reduction in air are typically formed by installing a set of rings inside a circular duct with decreasing inner radius according to a power law. As such, the structure is very complex and difficult to be practically realized, which challenges the practical application of SBHs for sound reduction. This study explores the possibilities of achieving SBH effects using other types of structural configurations. In particular, micro-perforated panels are proposed to be introduced into the conventional SBH structure. Simulation results show that the proposed SBH structure requires a small number of rings and is more efficient in terms of sound energy trapping and dissipation.
AB - Acoustic black holes (ABHs) have been so far investigated mainly for bending wave manipulation in mechanical structures such as beams or plates. The investigations on ABHs for sound wave manipulation, referred to as Sonic black holes (SBHs) are scarce. Existing SBH structures for sound reduction in air are typically formed by installing a set of rings inside a circular duct with decreasing inner radius according to a power law. As such, the structure is very complex and difficult to be practically realized, which challenges the practical application of SBHs for sound reduction. This study explores the possibilities of achieving SBH effects using other types of structural configurations. In particular, micro-perforated panels are proposed to be introduced into the conventional SBH structure. Simulation results show that the proposed SBH structure requires a small number of rings and is more efficient in terms of sound energy trapping and dissipation.
KW - noise
UR - http://www.scopus.com/inward/record.url?scp=85117369377&partnerID=8YFLogxK
U2 - 10.3397/IN-2021-1560
DO - 10.3397/IN-2021-1560
M3 - Conference article published in proceeding or book
AN - SCOPUS:85117369377
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.
T2 - 50th International Congress and Exposition of Noise Control Engineering, INTER-NOISE 2021
Y2 - 1 August 2021 through 5 August 2021
ER -