On the Interdependence of Loudspeaker Motor Nonlinearities

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Two of the main nonlinearities in the electrodynamic loudspeaker are the position dependence of the force factor, Bl, and the voice coil inductance, Le. Since they both are determined by the geometry of the motor structure, they cannot be independent. This paper investigates this dependence both analytically and via FEM simulations. Under certain simplifying assumptions the force factor can be shown to be proportional to the spatial derivative of the inductance. Using FEM simulations the implications of this relation is illustrated for drivers with more realistic geometry and material parameters.
Original languageEnglish
Title of host publicationProceedings of 145th Audio Engineering Society Convention
Number of pages10
PublisherAudio Engineering Society
Publication date2018
Publication statusPublished - 2018
Event145th International Pro Audio Convention - Jacob K. Javits Convention Center, New York, United States
Duration: 17 Oct 201820 Oct 2018


Conference145th International Pro Audio Convention
LocationJacob K. Javits Convention Center
CountryUnited States
CityNew York
Internet address

Cite this

Agerkvist, F. T., & Heuchel, F. M. (2018). On the Interdependence of Loudspeaker Motor Nonlinearities. In Proceedings of 145th Audio Engineering Society Convention Audio Engineering Society.