TY - GEN
T1 - Traffic noise radiation suppression in an unbaffled long enclosure using micro-perforated panel
AU - Yang, Weiping
AU - Choy, Yatsze
AU - Li, Ying
N1 - Funding Information:
The authors would like to acknowledge the funding support from the Research Grants Council, Hong Kong (PolyU15209520).
Publisher Copyright:
© ICA 2022.All rights reserved
PY - 2022/10
Y1 - 2022/10
N2 - Sound radiation control of an unbaffled long enclosure using corrugated Z-shaped micro-perforated panel absorbers (ZMPPAs) is investigated. First, a hybrid model based on the finite element method (FEM) and the Wiener-Hopf (WH) technique is established to calculate the sound pressure level (SPL) radiated from an unbaffled long enclosure. Subsequently, an array of ZMPPAs is proposed to absorb higher-order acoustical modes inside the long enclosure so that the radiated noise can be suppressed. After that, the sound attenuation performance of ZMPPAs is evaluated and compared with that of corrugated and flat microperforated panel absorbers (CMPPAs, FMPPAs). The results demonstrate that ZMPPAs can reduce the radiated SPL within a wide frequency range which is favorable for the suppression of environmental noise. Finally, the performance of the ZMPPAs, CMPPAs, and FMPPAs in reducing the radiated noise from an unbaffled long enclosure is examined using a quasi-2D test rig. The experimental results coincide well with the calculated results which validates the proposed model and verifies part of the numerical findings.
AB - Sound radiation control of an unbaffled long enclosure using corrugated Z-shaped micro-perforated panel absorbers (ZMPPAs) is investigated. First, a hybrid model based on the finite element method (FEM) and the Wiener-Hopf (WH) technique is established to calculate the sound pressure level (SPL) radiated from an unbaffled long enclosure. Subsequently, an array of ZMPPAs is proposed to absorb higher-order acoustical modes inside the long enclosure so that the radiated noise can be suppressed. After that, the sound attenuation performance of ZMPPAs is evaluated and compared with that of corrugated and flat microperforated panel absorbers (CMPPAs, FMPPAs). The results demonstrate that ZMPPAs can reduce the radiated SPL within a wide frequency range which is favorable for the suppression of environmental noise. Finally, the performance of the ZMPPAs, CMPPAs, and FMPPAs in reducing the radiated noise from an unbaffled long enclosure is examined using a quasi-2D test rig. The experimental results coincide well with the calculated results which validates the proposed model and verifies part of the numerical findings.
KW - Micro-perforated panel absorber
KW - Sound suppression
KW - Unbaffled long enclosure
UR - http://www.scopus.com/inward/record.url?scp=85162289108&partnerID=8YFLogxK
M3 - Conference article published in proceeding or book
AN - SCOPUS:85153759127
T3 - Proceedings of the International Congress on Acoustics
SP - 115
EP - 122
BT - 24th International Congress on Acoustics, ICA 2022
T2 - 24th International Congress on Acoustics, ICA 2022
Y2 - 24 October 2022 through 28 October 2022
ER -