Electroacoustic absorbers based on finite-time control of loudspeakers: a numerical investigation

Abstract : This paper proposes a numerical investigation of a controlled loudspeaker designed to absorb acoustic plane waves at a duct termination. More precisely, a nonlinear control for a current-driven loudspeaker is presented, that relies on (i) measurements of velocity and acoustic pressure at the membrane, (ii) a linear electroacoustic loudspeaker model and (iii) a nonlinear finite-time control method. Numerical tests are carried out by a passive-guaranteed simulation of the loudspeaker dynamics in the port-Hamiltonian systems formalism. The sound absorption efficiency is evaluated up to 300Hz by computing the reflected pressure at the membrane. The results are compared with a similar control architecture: the finite-time control for sound absorption proves effective, especially in the low frequency range.
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https://hal.archives-ouvertes.fr/hal-02046069
Contributor : David Roze <>
Submitted on : Friday, February 22, 2019 - 3:03:01 PM
Last modification on : Wednesday, July 24, 2019 - 3:49:35 PM

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  • HAL Id : hal-02046069, version 1

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Tristan Lebrun, Marc Wijnand, Thomas Hélie, David Roze, Brigitte d'Andréa-Novel. Electroacoustic absorbers based on finite-time control of loudspeakers: a numerical investigation. International Nonlinear Dynamics Conference, Feb 2019, Rome, Italy. ⟨hal-02046069⟩

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