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    APPARATUS AND METHOD FOR CONTROLLING SOUND FIELD
    1.
    发明公开
    APPARATUS AND METHOD FOR CONTROLLING SOUND FIELD 审中-公开

    公开(公告)号：EP4408031A1

    公开(公告)日：2024-07-31

    申请号：EP24153133.4

    申请日：2024-01-22

    申请人： Alps Alpine Co., Ltd.

    发明人： Ise, Tomohiko

    IPC分类号： H04S7/00 ,  H04R1/40 ,  G10K11/178

    CPC分类号： H04S7/305 ,  H04R1/403 ,  H04S2420/1320130101 ,  G10K11/17857 ,  G10K11/1783 ,  H04R2201/02520130101 ,  H04R2499/1520130101

    摘要： The present invention includes a filtering unit configured to perform filtering on input audio signals in accordance with coefficients set for a plurality of audio outputs, respectively, and a plurality of speakers configured to output audio in response to audio signals filtered for the plurality of audio outputs. The filtering unit performs the filtering on the input audio signals in accordance with the coefficients adjusted so that the sound pressures and the sound pressure gradients at a plurality of control points set on a boundary plane of an enclosed space surrounding the plurality of speakers reach values corresponding to a desired sound field. This allows producing a desired sound field on the boundary plane of the enclosed space surrounding the sound sources by making use of the properties of the Kirchhoff-Helmholtz integral equation that requires that the sound sources are present in an enclosed space.

    VERFAHREN ZUR SCHALLWIEDERGABE IN REFLEXIONSUMGEBUNGEN, INSBESONDERE IN HÖRRÄUMEN
    7.
    发明公开
    VERFAHREN ZUR SCHALLWIEDERGABE IN REFLEXIONSUMGEBUNGEN, INSBESONDERE IN HÖRRÄUMEN 审中-公开
    在反射环境中播放声音的方法，特别是在空间中

    公开(公告)号：EP3314915A1

    公开(公告)日：2018-05-02

    申请号：EP16736793.7

    申请日：2016-06-24

    申请人： Saalakustik.de GmbH

    发明人： VON SCHULTZENDORFF, Gernot

    IPC分类号： H04S7/00 ,  H04R27/00

    CPC分类号： H04S7/305 ,  H04R27/00 ,  H04R2227/007 ,  H04S2420/01

    摘要： The invention relates to a method in which, primarily in listening rooms, instead of the spatial sound of the respective environment, the spatial sound of a third room can be made substantially enveloping in the perception of the listener. The third room spatial acoustics perceived instead of the listening room spatial acoustics act in the same way in terms of hearing physiology as the spatial acoustics of natural rooms, namely enveloping in terms of the spatial sound (in distinction to direct sound). This type of spatial enveloping effect can also be incorporated emotionally by the listener into the auditory event, and has no sweet spot problem (there is a large preferred listening area instead of a preferred listening spot) and lets deep frequencies take effect in a way through which subwoofer speakers can generally be omitted.

    PERSONAL MULTICHANNEL AUDIO PRECOMPENSATION CONTROLLER DESIGN
    8.
    发明公开
    PERSONAL MULTICHANNEL AUDIO PRECOMPENSATION CONTROLLER DESIGN 审中-公开

    公开(公告)号：EP3183892A4

    公开(公告)日：2018-04-18

    申请号：EP14900064

    申请日：2014-08-21

    申请人： DIRAC RES AB

    发明人： BAHNE ADRIAN ,  AHLEN ANDERS

    IPC分类号： H04S7/00 ,  H04R3/12 ,  H04R5/00

    CPC分类号： H04S7/305 ,  H04R3/12 ,  H04S7/301 ,  H04S7/302 ,  H04S2400/01

    摘要： Disclosed is a method for determining filter coefficients of an audio precompensation controller for the compensation of an associated sound system, including N≧2 loudspeakers, including estimating, for each one of at least a pair of the loudspeakers, a model transfer function at each of M control points distributed in Z≧2 spatially separated listening zones in a listening environment of the sound system. The method also includes determining, for each of the M control points, a zone-dependent target transfer function at least based on the zone affiliation of the control point; and determining the filter coefficients of the audio precompensation controller at least based on the model transfer functions and the target transfer functions of the M control points. Consequently, an audio precompensation controller for an associated sound system can be obtained that enables improved and/or customized sound reproduction in two or more listening zones simultaneously.