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Conference paper

Design and Evaluation of Accelerometer based Motional Feedback

In Proceedings of 138th International Audio Engineering Society (aes) Convention — 2015

By Schneider, Henrik1,2,3; Pranjic, Emilio4; Agerkvist, Finn T.1,2; Knott, Arnold1,3; Andersen, Michael A. E.1,3

From

Department of Electrical Engineering, Technical University of Denmark1

Acoustic Technology, Department of Electrical Engineering, Technical University of Denmark2

Electronics, Department of Electrical Engineering, Technical University of Denmark3

Technical University of Denmark4

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.

Language: English
Publisher: Audio Engineering Society
Year: 2015
Proceedings: 138th Audio Engineering Society Convention
Types: Conference paper
ORCIDs: Schneider, Henrik , Agerkvist, Finn T. , Knott, Arnold and Andersen, Michael A. E.

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