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Low frequency room excitation using Distributed Mode Loudspeakers

Fazenda, Bruno, Avis, M.R. and Davies, W.J. (2002) Low frequency room excitation using Distributed Mode Loudspeakers. In: AES 21st International Conference, 1–3 June 2002, St. Petersburg, Russia.

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    Abstract

    Conventional pistonic loudspeakers excite the modes of an enclosed sound field in such a way as to introduce modal
    artefacts which may be problematic for listeners to high-quality reproduced sound [1]. Their amelioration may
    involve the use of highly space-consumptive passive absorptive devices or active control techniques [eg 2,3,4].
    Other approaches have concentrated on the design of the driver used to excite the room. Distributed sources ranging
    from the dipole [5] to more complex configurations [6] may be expected to interact with the room eigenvectors in a
    complicated manner which may be optimised in terms of the spatial and frequency-domain variance of the
    soundfield. Recent interest in distributed sources has centred on the Distributed Mode Loudspeaker (DML), and this
    paper reports an investigation into the interaction of DMLs with modal soundfields. It is shown that large DMLs
    may be expected to modify the low-frequency soundfield. Producing useful low-frequency control remains difficult
    but may be achieved in some circumstances.

    Item Type: Conference or Workshop Item (Paper)
    Additional Information: Reproduced with the kind permission of the Audio Engineering Society
    Subjects: T Technology > TA Engineering (General). Civil engineering (General)
    Q Science > QC Physics
    Schools: School of Computing and Engineering
    Related URLs:
    Depositing User: Graham Stone
    Date Deposited: 03 Mar 2009 15:34
    Last Modified: 28 Jul 2010 19:31
    URI: http://eprints.hud.ac.uk/id/eprint/3545

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