Prediction of harmonic distortion generated by electro-dynamic loudspeakers using cascade of Hammerstein modelsReportar como inadecuado




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1 LIMSI - Laboratoire d-Informatique pour la Mécanique et les Sciences de l-Ingénieur 2 LMS - Laboratoire de mécanique des solides 3 TSI - Département Traitement du Signal et des Images 4 sonic emotion - sonic emotion

Abstract : Audio rendering systems are always slightly nonlinear. Their non-linearities must be modeled and mea- sured for quality evaluation and control purposes. Cascade of Hammerstein models describes a large class of non-linearities. To identify the elements of such a model, a method based on a phase property of exponential sine sweeps is proposed. A complete model of non-linearities is identified from a single mea- surement. Cascade of Hammerstein models corresponding to an electro-dynamic loudspeaker are identified this way. Harmonic distortion is afterward predicted using the identified models. Comparisons with clas- sical measurements techniques show that harmonic distortion is accurately predicted by the identified models over the entire audio frequency range for any desired input amplitude.

Keywords : Nonlinear system identification Loudspeakers





Autor: Marc Rébillat - Romain Hennequin - Etienne Corteel - Brian Katz -

Fuente: https://hal.archives-ouvertes.fr/



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