Assessing the Sound Absorption of Micro-Perforated Panels by Using the Transfer Function and the Impedance Tube
Journal Title: Romanian Journal of Acoustics and Vibration - Year 2012, Vol 9, Issue 2
Abstract
Micro-perforated panels (MPP) are made and used for decades, a number of researchers proposing to use MPPs for enclosures, featuring the benefits of using them outside as sound barriers, studying the effect of vibration of these panels, which can reduce the sound absorption. Experimental method of transfer function for a series of measurements using the impedance tube was made in order to determine the sound absorption coefficient (α). The resulted values of α for two proposed sets of MPPs, were analyzed and compared, also observing the importance of the air cavity behind the MPP. Some conclusions are observed and compared to the Helmholtz resonator properties.
Authors and Affiliations
Florina-Anca STREMŢAN, Iulian LUPEA
Keywords
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