Agerkvist, Finn T.

Andersen, Michael A. E.

Bjerregaard, Ruben

Madsen, Anders Normann

Schneider, Henrik

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

Online Research Database In Technology

Accelerometer Based Motional Feedback Integrated in a 2 3/4" Loudspeaker - DTU Orbit(09/11/2017) Accelerometer Based Motional Feedback Integrated in a 2 3/4" LoudspeakerIt 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 basedmotional feedback is one of these methods and was already thoroughly described in the 1960s showing good results atlow frequencies. In spite of this, the technique has mainly been used for closed box subwoofers to a limited extent. In thispaper, design and experimental results for a 23/4" acceleration based motional feedback loudspeaker are shown toextend this feedback method to a small full range loudspeaker. Furthermore, the audio quality from the system withfeedback is discussed based on measurements of harmonic distortion, intermodulation distortion and subjectiveevaluation. General informationState: PublishedOrganisations: Department of Electrical Engineering, Electronics, Acoustic Technology, Technical University of DenmarkAuthors: Bjerregaard, R. (Ekstern), Madsen, A. N. (Ekstern), Schneider, H. (Intern), Agerkvist, F. T. (Intern), Andersen, M.A. E. (Intern)Number of pages: 10Publication date: 2016 Host publication informationTitle of host publication: Proceedings of the 140th Audio Engineering Society ConventionPublisher: Audio Engineering SocietyArticle number: 9534Main Research Area: Technical/natural sciencesConference: 140th International Audio Engineering Society Convention, Paris, France, 04/06/2016 - 04/06/2016Source: PublicationPreSubmissionSource-ID: 124105078Publication: Research - peer-review › Article in proceedings – Annual report year: 2016 

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

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

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Online Research Database In Technology