| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5010814 | Applied Acoustics | 2017 | 6 Pages |
Abstract
Acoustic performance of a micro-perforated panel with an incompletely partitioned cavity (MPPIPC) is investigated. A MPPIPC is achieved by inserting separators, which are shorter than the depth of the cavity, periodically behind the micro-perforated panel (MPP). Due to these separators, the sound field in the cavity is significantly changed. This paper reveals these unique sound reflection modes among the separators, based on which a theoretical model is proposed to calculate the absorption coefficient of a MPPIPC in the diffusion field. Experiments verified the theoretical predictions. These results indicate that the appropriately arranged insertion can improve the performance of a MPP absorber effectively at low frequencies.
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Authors
Sibo Huang, Shengming Li, Xu Wang, Dongxing Mao,