Design and Evaluation of Accelerometer based Motional Feedback

Henrik Schneider, Emilio Pranjic, Finn T. Agerkvist, Arnold Knott, Michael A. E. Andersen

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    Abstract

    The electro dynamic loudspeaker is often referred to as the weakest link in the audio chain due to low efficiency and high distortion levels at low frequencies and high diaphragm excursion. Compensating for loudspeaker non-linearities using feedback or feedforward methods can improve the distortion and enable radical design changes in the loudspeaker which can lead to efficiency improvements. In combination this has motivated a revisit of the accelerometer based motional feedback technique. Experimental results on a 8 inch subwoofer show that the total harmonic distortion can be significantly reduced at low frequencies and large displacements.
    Original languageEnglish
    Title of host publicationProceedings of 138th International Audio Engineering Society (AES) Convention.
    Number of pages7
    PublisherAudio Engineering Society
    Publication date2015
    Article number9293
    Publication statusPublished - 2015
    Event138th Audio Engineering Society Convention - Warsaw, Poland
    Duration: 7 May 201510 May 2015
    Conference number: 138

    Conference

    Conference138th Audio Engineering Society Convention
    Number138
    Country/TerritoryPoland
    CityWarsaw
    Period07/05/201510/05/2015

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