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A Versatile Analytical Approach for Assessing Harmonic Distortion in Current-Driven Electrodynamic Loudspeakers

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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.

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JAES Volume 62 Issue 3 pp. 127-144; March 2014
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Permalink: http://www.aes.org/e-lib/browse.cfm?elib=17128

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