Improvements in Elimination of Loudspeaker Distortion in Acoustic Measurements

Finn T. Agerkvist, Antoni Torras Rosell, Richard Ian McWalter

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


    This paper investigates the influence of nonlinear components that contaminate the linear response of acoustic transducers, and presents improved methods for eliminating the influence of nonlinearities in acoustic measurements. The method is evaluated with pure sinusoidal signals as well as swept sine signal and is tested on models of memoryless nonlinear systems as well as nonlinear loudspeakers. The method is shown to give a clear benefit over existing methods. Two techniques that improve the signal-to-noise ratio are demonstrated: the first uses more measurement levels than the number of orders to be separated, whereas the other one is based on standard Tikhonov regularization. Both methods are shown to significantly improve the signal-to-noise ratio.
    Original languageEnglish
    Title of host publicationProceedings of 138th International Audio Engineering Society (AES) Convention
    Number of pages10
    PublisherAudio Engineering Society
    Publication date2015
    Publication statusPublished - 2015
    Event138th Audio Engineering Society Convention - Warsaw, Poland
    Duration: 7 May 201510 May 2015
    Conference number: 138


    Conference138th Audio Engineering Society Convention


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