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Kimihiro Sakagami, Midori Kusaka and Takeshi Okuzono
Recently, dotted-art MPPs have been proposed in which a designed pattern is made with the holes. In such a case, the MPP becomes heterogeneous in general. However, existing theories used for the prediction of the absorption characteristics of MPPs assume...
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Pedro Cobo
Although the original proposal of microperforated panels by Maa consisted of an array of minute circular holes evenly distributed in a thin plate, other hole geometries have been recently suggested that provide similar absorption curves to those of circu...
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Kimihiro Sakagami, Midori Kusaka, Takeshi Okuzono and Shinsuke Nakanishi
In this study, we discuss the effect of the manufacturing accuracy of a microperforated panel (MPP) produced by 3D printers on acoustic properties through measured and calculated results as a pilot study. The manufacturing costs of MPPs have long been on...
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Xiaocui Yang, Xinmin Shen, Haiqin Duan, Fei Yang, Xiaonan Zhang, Ming Pan and Qin Yin
Sound absorption performance of polyurethane foam could be improved by adding a prepositive microperforated polymethyl methacrylate panel to form a composite sound-absorbing structure. A theoretical sound absorption model of polyurethane foam and that of...
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Xinmin Shen, Panfeng Bai, Xiaocui Yang, Xiaonan Zhang and Sandy To
The optimal combination structure low frequency sound absorber can be used in acoustic environmental protection and industrial noise reduction.
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