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2024 | OriginalPaper | Chapter

Control of an Acoustic Mode by a Digitally Created Nonlinear Electroacoustic Absorber at Low Excitation Levels: Experimental Results

Authors : Maxime Morell, Manuel Collet, Emmanuel Gourdon, Alireza Ture Savadkoohi, Emanuele De Bono

Published in: Advances in Nonlinear Dynamics, Volume II

Publisher: Springer Nature Switzerland

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Abstract

In this study, an acoustic mode of a tube is controlled by a digitally created nonlinear electroacoustic absorber (NEA) at low excitation levels, where the nonlinearity cannot be normally activated in passive vibro-acoustic absorbers. A comparison is carried out between a linear electroacoustic absorber, similar to a tuned mass damper (TMD) in mechanics, and a digital NEA. The innovative method for creating a NEA lies on real-time integration of the dynamics of the device. It permits to choose any behavior of the system by digitally programming the corresponding targeted dynamics. Here, a loudspeaker impedance control law with a cubic stiffness is considered, as this system is well-known in mechanics and provides nonlinear phenomena that are highlighted at low and moderate excitation levels in our study.

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Title: Control of an Acoustic Mode by a Digitally Created Nonlinear Electroacoustic Absorber at Low Excitation Levels: Experimental Results
Authors: Maxime Morell
Manuel Collet
Emmanuel Gourdon
Alireza Ture Savadkoohi
Emanuele De Bono
Publisher: Springer Nature Switzerland
Book: Advances in Nonlinear Dynamics, Volume II
Print ISBN: 978-3-031-50638-3

Electronic ISBN: 978-3-031-50639-0

Copyright Year: 2024
DOI: https://doi.org/10.1007/978-3-031-50639-0_16

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