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A power-balanced dynamic model of ferromagnetic coils

Judy Najnudel 1 Rémy Muller 1 Thomas Hélie 1 David Roze 1
1 S3AM - Systèmes et Signaux Sonores : Audio/Acoustique, instruMents
STMS - Sciences et Technologies de la Musique et du Son
Abstract : This paper proposes a new macroscopic physical model of ferromagnetic coils used in audio circuits. To account for realistic saturation and hysteretic phenomena, this model combines statistical physics results, measurement-driven refinements and port-Hamiltonian formulations that guarantee passivity, thermodynamic consistency and composability according to both electric and thermal ports. As an illustration, the model is used to simulate a passive high-pass filter. Different types of audio inputs are considered and simulations are compared to measurements.
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Contributor : David Roze <>
Submitted on : Friday, November 20, 2020 - 11:58:54 AM
Last modification on : Friday, January 8, 2021 - 2:04:40 PM


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  • HAL Id : hal-02920534, version 1


Judy Najnudel, Rémy Muller, Thomas Hélie, David Roze. A power-balanced dynamic model of ferromagnetic coils. 23rd International Conference on Digital Audio Effects (eDAFx-20), Sep 2020, Vienne, Austria. ⟨hal-02920534⟩



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