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

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

Technical University of Denmark

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

Abstract

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 language	English
Title of host publication	Proceedings of the 140th Audio Engineering Society Convention
Number of pages	10
Publisher	Audio Engineering Society
Publication date	2016
Article number	9534
Publication status	Published - 2016
Event	140th International Audio Engineering Society Convention - Paris, France Duration: 4 Jun 2016 → 7 Jun 2016

Conference

Conference	140th International Audio Engineering Society Convention
Country/Territory	France
City	Paris
Period	04/06/2016 → 07/06/2016

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title = "Accelerometer Based Motional Feedback Integrated in a 2 3/4{"} Loudspeaker",

abstract = "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.",

author = "Ruben Bjerregaard and Madsen, {Anders Normann} and Henrik Schneider and Agerkvist, {Finn T.} and Andersen, {Michael A. E.}",

year = "2016",

language = "English",

booktitle = "Proceedings of the 140th Audio Engineering Society Convention",

publisher = "Audio Engineering Society",

note = "140th International Audio Engineering Society Convention ; Conference date: 04-06-2016 Through 07-06-2016",

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T1 - Accelerometer Based Motional Feedback Integrated in a 2 3/4" Loudspeaker

AU - Bjerregaard, Ruben

AU - Madsen, Anders Normann

AU - Schneider, Henrik

AU - Agerkvist, Finn T.

AU - Andersen, Michael A. E.

PY - 2016

Y1 - 2016

N2 - 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.

AB - 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.

M3 - Article in proceedings

BT - Proceedings of the 140th Audio Engineering Society Convention

PB - Audio Engineering Society

T2 - 140th International Audio Engineering Society Convention

Y2 - 4 June 2016 through 7 June 2016

ER -

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

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