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Electrodynamic loudspeaker linearization using a low complexity pth-Order inverse nonlinear filter

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Merabti, H., Massicotte, D. et Zhu, W. P. (2019, December 10-12). Electrodynamic loudspeaker linearization using a low complexity pth-Order inverse nonlinear filter. Dans 2019 IEEE International Symposium on Signal Processing and Information Technology (ISSPIT), Ajman, United Arab Emirates.

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Résumé

Nonlinear distortions are very challenging to tackle in electromechanical loudspeakers. They are observed in large signals mode, where high amplitude stimulus drives different components of the transducer to operate in their nonlinear region, resulting in harmonic and intermodulation distortions in the reproduced sounds. Many linearization schemes have been proposed to address this problem, they operate by pre-distorting the input signal before exciting the loudspeaker, in the aim of radiating distortion-free sound waves. In this work, we are interested in the performance evaluation of a low computational complexity feedforward linearization structure which is based on the pth order inverse of a one-dimension Volterra model of the driver. The scheme is designed to compensate for the 2nd and 3rd harmonic distortions. We will study the effect of varying the input voltage amplitude on the harmonic distortions reduction performance. A lumped-parameters model with parameters of a real driver will be used for the evaluation.

Type de document: Document issu d'une conférence ou d'un atelier
Mots-clés libres: Nonlinear systems Loudspeaker linearization Black box modeling Volterra models
Date de dépôt: 09 mai 2022 19:22
Dernière modification: 09 mai 2022 19:22
URI: https://depot-e.uqtr.ca/id/eprint/10138

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