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    ENCEINTE ACOUSTIQUE ACTIVE AVEC HAUT-PARLEUR A MODE DISTRIBUE MULTI-TRANSDUCTEUR
    1.
    发明公开
    ENCEINTE ACOUSTIQUE ACTIVE AVEC HAUT-PARLEUR A MODE DISTRIBUE MULTI-TRANSDUCTEUR 有权
    与ACTIVE弯曲波变频器柜

    公开(公告)号：EP2145504A2

    公开(公告)日：2010-01-20

    申请号：EP08787891.4

    申请日：2008-04-02

    申请人： Parrot

    发明人： BARBÉ, Christophe ,  ETCHEPARRE, Jean ,  CHANAL, Frédéric

    IPC分类号： H04R1/24 ,  H04R7/04

    CPC分类号： H04R1/24 ,  H04R7/045

    摘要： The invention relates to a distributed-mode loudspeaker (10) with a non-piston effect radiant panel (12) excited with a random phase and amplitude distribution by at least two electro-acoustic transducers (14, 16) arranged in a predetermined non-symmetrical manner on the radiant panel. An amplification means (48) receives an input signal to be rendered and are coupled at their outputs to said transducers, while a filter means distributes between the two transducers, based on a predetermined respective frequency characteristic, the signal to be rendered supplied by the amplification means. Amplification means (48) include a plurality of separate class-D switching power stages (52, 54, 56), each of which is directly connected at the output thereof to a respective transducer. The filter means is a digital filter means (60-66) provided upstream from the power stages for applying the predetermined respective frequency characteristic to a signal to be rendered before the transmission thereof to each of the respective power stages.