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Determination of Loudspeaker Driver Parameters Using a System Identification Technique

A time-domain method for measuring the parameters of linear models of loudspeaker drivers is described. The loudspeaker is excited by a low-pass filtered square-wave voltage or current input. In addition to voltage and current, the cone displacement is measured and recorded by a personal computer. From these data the parameters are estimated by system identification techniques, in particular the least-squares and the instrumental-variable algorithms. Application of the method on a number of loudspeakers, as well as on known simulated models, indicates that it is both fast and accurate.

Authors: Knudsen, Morten H.; Jensen, Jørgen G.; Julskjaer, Vagn; Rubak, Per
Affiliation: Institute of Electronic Systems, Aalborg University, Aalborg, Denmark
JAES Volume 37 Issue 9 pp. 700-708; September 1989 Import into BibTeX

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