The sound attenuation performance of microperforated panels (MPP) with adjoining air cavity is demonstrated. First of all, simulated results are shown based upon Maa's work investigating the parameters which impact MPP performance [1]. It is shown that the most important parameter is the depth of the adjoining cavity. Following this, an experimental study was undertaken to compare the performance of an MPP to that of standard foam. Following this, two strategies to improve the MPP performance are implemented. These include partitioning the air cavity and having a cavity with varying depth. Both strategies show a marked improvement in MPP attenuation.
Application of Micro-Perforated Panels to Attenuate Noise in a Duct
Sae Technical Papers
SAE 2007 Noise and Vibration Conference and Exhibition ; 2007
2007-05-15
Conference paper
English
Application of Micro-Perforated Panels to Attenuate Noise in a Duct
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