Digital compensation of nonlinear distortion in loudspeakers

Ruurd de Vries, Arthur P. Berkhoff, Cornelis H. Slump, Otto E. Herrmann

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    Abstract

    The authors present a method to compensate for loudspeaker distortion in real time by nonlinear digital signal processing implemented on a digital signal processor (i.e., the TMS320C30 DSP). Based on the literature, an electrical equivalent circuit of an electrodynamic loudspeaker is developed, resulting in a linear lumped parameter model. The parameters in this model are matched with the measurements of a selected test loudspeaker. The linear model is extended to include nonlinear effects by developing the parameters as a function of the voice coil excursion of the loudspeaker in a Taylor series expansion. The resulting nonlinear system is described by a Volterra series. On the basis of this description, an inverse circuit is designed for the second-order nonlinear distortion. This circuit was implemented in real time on the DSP, using a high-level design and code generation system. Simulations and experiments are presented
    Original languageEnglish
    Title of host publicationICASSP-93
    Subtitle of host publication1993 IEEE International Conference on Acoustics, Speech, and Signal Processing, April 27-30, 1993, Minneapolis, Minnesota
    Place of PublicationPiscataway, N.J.
    PublisherIEEE
    Pages165-168
    Number of pages4
    Volume1
    ISBN (Print)0-7803-0946-4
    DOIs
    Publication statusPublished - Apr 2003
    Event1993 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 1993 - Minneapolis, United States
    Duration: 27 Apr 199330 Apr 1993

    Publication series

    NameProceedings IEEE International Conference on Acoustics, Speech, and Signal Processing
    PublisherIEEE
    Volume1993
    ISSN (Print)1520-6149

    Conference

    Conference1993 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 1993
    Abbreviated titleICASSP
    CountryUnited States
    CityMinneapolis
    Period27/04/9330/04/93

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  • Cite this

    de Vries, R., Berkhoff, A. P., Slump, C. H., & Herrmann, O. E. (2003). Digital compensation of nonlinear distortion in loudspeakers. In ICASSP-93: 1993 IEEE International Conference on Acoustics, Speech, and Signal Processing, April 27-30, 1993, Minneapolis, Minnesota (Vol. 1, pp. 165-168). (Proceedings IEEE International Conference on Acoustics, Speech, and Signal Processing; Vol. 1993). Piscataway, N.J.: IEEE. https://doi.org/10.1109/ICASSP.1993.319081