Accelerometer Based Motional Feedback Integrated in a 2 3/4" Loudspeaker

Ruben Bjerregaard, Anders Normann Madsen, Henrik Schneider, Finn T. Agerkvist, Michael A. E. Andersen

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


    It is a well known fact that loudspeakers produce distortion when they are driven into large diaphragm displacements. Various methods exist to reduce distortion using forward compensation and feedback methods. Acceleration based motional feedback is one of these methods and was already thoroughly described in the 1960s showing good results at low frequencies. In spite of this, the technique has mainly been used for closed box subwoofers to a limited extent. In this paper, design and experimental results for a 23/4" acceleration based motional feedback loudspeaker are shown to extend this feedback method to a small full range loudspeaker. Furthermore, the audio quality from the system with feedback is discussed based on measurements of harmonic distortion, intermodulation distortion and subjective evaluation.
    Original languageEnglish
    Title of host publicationProceedings of the 140th Audio Engineering Society Convention
    Number of pages10
    PublisherAudio Engineering Society
    Publication date2016
    Article number9534
    Publication statusPublished - 2016
    Event140th International Audio Engineering Society Convention - Paris, France
    Duration: 4 Jun 20167 Jun 2016


    Conference140th International Audio Engineering Society Convention


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