Microperforated Insertion Units in free field: A case study

descriptionPublicationkeyboard_double_arrow_right Conference object 01 Jan 2005 Spain Publisher:Scientific Society for Optics, Acoustics, Motion Picture and Theater Technology (Hungary)

Authors: Pfretzschner, Jaime; Fernández, Alejandro; Cobo, Pedro; Cuesta, María; Schmitt, A.;

handle: 10261/7938

Microperforated Insertion Units in free field: A case study

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Abstract

In 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.

6 pages.-- Communication presented at ForumAcusticum 2005 Budapest: "Acoustics: Science and Technology for Knowledge Based Society and Healthy Environment" (Aug 29-Sep 2, 2005).

We are grateful to the Spanish Ministry of Education and Science for funding this research under Grants No. DPI2001-1613-C02-01 and DPI2004-05504-C02-01.

Peer reviewed

Country

Spain

Related Organizations

Spanish National Research Council
Spain

Keywords

Wall lining, Design, Microperforated Insertion Units (MIU), Acoustic performance, Low frequencies, Active Noise Control Systems (ANC) (ANC) systems, Microperforated Panels (MPP), Experimental results

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