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Microperforated Insertion Units in free field: A case study

AuthorsPfretzschner, Jaime; Fernández, Alejandro; Cobo, Pedro; Cuesta, María; Schmitt, A.
KeywordsActive Noise Control Systems (ANC) (ANC) systems
Wall lining
Low frequencies
Microperforated Panels (MPP)
Microperforated Insertion Units (MIU)
Acoustic performance
Experimental results
Issue DateAug-2005
PublisherScientific Society for Optics, Acoustics, Motion Picture and Theater Technology (Hungary)
CitationProceedings of ForumAcusticum 2005 Budapest. RBA-CP: Characteristics and properties of building structures ; 347-0
AbstractIn Internoise 2004 we reported the new concept of Microperforated Insertion Units, MIU, introducing their innovative acoustic and mechanical performances as an alternative to the traditional Microperforated Panel Absorbers, MPP. Theoretical and experimental results were compared in an impedance tube with diameters of 3 and 10 mm. In this work, we consider the angular dependence of the absorption coefficient of a large MIU panel (2.4 x 2.4 m2) in free field. Both theoretical and experimental results are presented, showing the acoustic absorptive capabilities of the device.
Description6 pages.-- Communication presented at ForumAcusticum 2005 Budapest: "Acoustics: Science and Technology for Knowledge Based Society and Healthy Environment" (Aug 29-Sep 2, 2005).
Appears in Collections:(IA) Comunicaciones congresos

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