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 International Audio Engineering Society (AES) Convention - Warsaw, Poland
Duration: 7 May 201510 May 2015

Conference

Conference138th International Audio Engineering Society (AES) Convention
CountryPoland
CityWarsaw
Period07/05/201510/05/2015

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