Exponential swept-sine signals are very often used to analyze nonlinear audio systems. A reexamination of this methodology shows that a synchronization procedure is necessary for the proper analysis of higher harmonics. An analytical expression of spectra of the swept-sine signal is derived and used in the deconvolution of the impulse response. Matlab code for generation of the synchronized swept-sine, deconvolution, and separation of the impulse responses is given. This report provides a discussion of some application issues and an illustrative example of harmonic analysis of current distortion of a woofer. An analysis of the higher harmonics of the current distortion of a woofer is compared using both the synchronized and the non-synchronized swept-sine signals.
Novak, Antonin; Lotton, Pierrick; Simon, Laurent
Affiliation: Laboratoire d’Acoustique de l’Université du Maine, Le Mans, France
JAES Volume 63 Issue 10 pp. 786-798; October 2015
Publication Date: November 5, 2015
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