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.

Authors: Martinez, Jose; Bolaños, Fernando; Segovia Eulogio, Enrique; Ramis Soriano, Jaime
Affiliations: Acustica Beyma; DFISTS-University of Alicante; DICOPIU-University of Alicante(See document for exact affiliation information.)
AES Convention: 127 (October 2009) Paper Number: 7835
Publication Date: October 1, 2009
Subject: Transducers and Amplifiers

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