This research develops a compact and transparent analytical model of current-driven loudspeakers to assess their associated nonlinearities and harmonic distortion. Taylor polynomials are used to derive simple expressions for the first five harmonic distortion components of the spectrum: the significance of each parameter under consideration is rendered transparent using this methodology. This analytical approach is validated by performing a numerical analysis using Simulink software and can easily be implemented using a standard spreadsheet application. The measured parameters of a midrange generic transducer are used to compare the numerical and analytical approaches. The analytical approach is shown to be effective, and it enables the analysis of the evenness property of a given influence parameter. The analytical approach can also be used to model nonlinear parameters as a function of the diaphragm speed.

Authors: Gaviot, Etienne; Erza, Mehran; Polet, Frédéric; Camberlein, Lionel; Bêche, Bruno
Affiliations: Laboratoire d’Acoustique de l’Université du Maine, Micro Cap Ouest, LAUM, UMR CNRS, Le Mans, France; Institut de Physique de Rennes, IPR, UMR CNRS, Rennes, France; Institut Universitaire de France (IUF), Paris, France(See document for exact affiliation information.)
JAES Volume 62 Issue 3 pp. 127-144; March 2014
Publication Date: March 20, 2014 Import into BibTeX
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=17128

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E-Library Location: (CD JAES62)   /jaes62/3/pg127.pdf

DOI: https://doi.org/10.17743/jaes.2014.0011

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