On the realization of acoustic attenuation using a microperforated panel alone

The Journal of the Acoustical Society of America
Cheng Yang

Abstract

An attempt is made to achieve acoustic attenuation using a microperforated panel (MPP) without the commonly used backing air cavity. The underlying mechanism is the generation of the air motion inside the micropores as a result of the acoustic pressure difference on the two sides of the MPP. The acoustic environment in which such a mechanism is viable is found in a curved duct where the axial wavenumber below the cut-off frequency of the first dispersive mode is radius dependent. A MPP inserted into this duct results in an acoustic pressure difference on its two sides associated with the two sub-curved duct domains and enables the vibration of the air inside the micropores. Results show that energy is absorbed by the MPP and the effect extends over a broad frequency band and down to very low frequency.

References

Jul 27, 2011·The Journal of the Acoustical Society of America·Chunqi Wang, Lixi Huang
Aug 17, 2012·The Journal of the Acoustical Society of America·Teresa BravoCédric Pinhède
Jan 10, 2013·The Journal of the Acoustical Society of America·Cheng YangJie Pan
Feb 24, 2015·The Journal of the Acoustical Society of America·Xiang YuXiangyu You
Jan 3, 2016·The Journal of the Acoustical Society of America·Masahiro ToyodaKimihiro Sakagami
Sep 3, 2016·The Journal of the Acoustical Society of America·Di ZhouXiaofeng Sun

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Citations

Feb 4, 2019·The Journal of the Acoustical Society of America·Cheng Yang
Aug 6, 2020·The Journal of the Acoustical Society of America·Zhimin XuTian Jian Lu

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