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Article

Modelling of Microperforated Panel Absorbers with Circular and Slit Hole Geometries

Institute of Physical and Information Technologies (ITEFI), Spanish National Research Council (CSIC), Serrano 144, 28006 Madrid, Spain
Academic Editor: Rosario Aniello Romano
Acoustics 2021, 3(4), 665-678; https://doi.org/10.3390/acoustics3040042
Received: 1 September 2021 / Revised: 30 October 2021 / Accepted: 1 November 2021 / Published: 4 November 2021
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 circular holes. With the arrival of modern machining technologies, such as 3D printing, panels microperforated with slit-shaped holes are being specially considered. Therefore, models able to predict the absorption performance of microperforated panels with variable hole geometry are needed. The aim of this article is to analyze three models for such absorbing systems, namely, the Maa model for circular holes, the Randeberg–Vigran model for slit-shaped holes, and the Equivalent Fluid model for both geometries. The absorption curves predicted for these three models are compared with the measured curves of three panels microperforated with spirally shaped slits. View Full-Text
Keywords: sound absorption; microperforated panels; absorption models sound absorption; microperforated panels; absorption models
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MDPI and ACS Style

Cobo, P. Modelling of Microperforated Panel Absorbers with Circular and Slit Hole Geometries. Acoustics 2021, 3, 665-678. https://doi.org/10.3390/acoustics3040042

AMA Style

Cobo P. Modelling of Microperforated Panel Absorbers with Circular and Slit Hole Geometries. Acoustics. 2021; 3(4):665-678. https://doi.org/10.3390/acoustics3040042

Chicago/Turabian Style

Cobo, Pedro. 2021. "Modelling of Microperforated Panel Absorbers with Circular and Slit Hole Geometries" Acoustics 3, no. 4: 665-678. https://doi.org/10.3390/acoustics3040042

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