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Target Modes in Moving Assemblies of Pleated Loudspeaker

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In this work we present the process followed for the adjustment of a numerical model in finite elements of the mechanical behavior of a pleated loudspeaker, based on the AMT technology ( Air Motion Transformer). In this type of transducers, the diaphragm is formed by longitudinal folds. In the internal face of each one of these folds is printed a conductive ribbon. We have obtained firstly the participation factors and the generalized mass from the results of a natural vibration modal analysis. Next, an analysis is realized taking into account the loss factors of the materials, followed by a forced vibration modal analysis. Finally, a method is described for the characterization of the materials ( Young Modulus and Loss Factor), by using modal analysis techniques.

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Permalink: http://www.aes.org/e-lib/browse.cfm?elib=15030

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