Determination of unknown parameters in impervious layers by inverse method

In this work, a novel procedure is shown for the determination of unknown parameters in impervious layers used in multilayer structures by inverse method and using scale models. Experimental pressure and velocity data are obtained by Nearfield Acoustic Holography (NAH) for the calculation of the tra...

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2008-05, Vol.123 (5_Supplement), p.3614-3614
Main Authors: Escuder Silla, Eva, Alba Fernandez, Jesús, Ramis Soriano, Jaime, Del Rey Tormos, Romina
Format: Article
Language:English
Online Access:Get full text
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Summary:In this work, a novel procedure is shown for the determination of unknown parameters in impervious layers used in multilayer structures by inverse method and using scale models. Experimental pressure and velocity data are obtained by Nearfield Acoustic Holography (NAH) for the calculation of the transmission loss of the different multilayer structures mounted on the window of a wooden box designed for that end. These data are used as input data in the inverse method. The forecast model of acoustic insulation in multilayered structures used in this work was Trochidis&Kalaroutis model based on Spatial Fourier Transform (SFT). By applying Trochidis&Kalaroutis model and adjusting by numerical methods the variables that define the impervious layers of the system, the values of the unknown magnitudes of the layers are calculated. For validation purposes the results are compared to those obtained with Ookura&Saito model.
ISSN:0001-4966
1520-8524
DOI:10.1121/1.2934813