Author(s)

A. Dobrucki & P. Pruchnicki

Abstract

Application of Wiener series for assessment of the quality of the NARMAX model of dynamic loudspeakers A. Dobrucki & P. Pruchnicki Wroclaw University of Technology, Institute of Telecommunications and Acoustics, Poland Abstract The polynomial representation of the NARMAX model of a dynamic loudspeaker is presented. To compare different models one needs a quality criterion. The simplest quality measure is the difference between the model output signals and the object (the actual loudspeaker) output signals if the same input signal is used. But this measure provides no information about the characteristics of either the model or the actual loudspeaker. The information can be obtained from the Volterra series or from its orthogonal version called the Wiener series. The latter has been applied to an actual loudspeaker and its NARMAX model. Euclid's norm was used to determine the difference between the Wiener series of the loudspeaker and that of its model. The model's accuracy was verified for dy

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