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    Loudspeaker with reduced audio coloration caused by reflections from a surface
    1.
    发明授权
    Loudspeaker with reduced audio coloration caused by reflections from a surface 有权

    公开(公告)号：US12192698B2

    公开(公告)日：2025-01-07

    申请号：US18377261

    申请日：2023-10-05

    Applicant: APPLE INC.

    Inventor： Martin E. Johnson ,  Simon K. Porter ,  Suzanne Hardy ,  John H. Sheerin

    IPC: H04R1/28 ,  H04R1/02 ,  H04R1/26 ,  H04R1/40 ,  H04R3/14

    Abstract: Loudspeakers are described that may reduce comb filtering effects perceived by a listener by either 1) moving transducers closer to a sound reflective surface (e.g., a baseplate, a tabletop or a floor) through vertical (height) or rotational adjustments of the transducers or 2) guiding sound produced by the transducers to be released into the listening area proximate to the reflective surface through the use of horns and openings that are at a prescribed distance from the reflective surface. The reduction of this distance between the reflective surface and the point at which sound emitted by the transducers is released into the listening area may lead to shorter reflected path that reduces comb filtering effects caused by reflected sounds that are delayed relative to the direct sound. Accordingly, the loudspeakers shown and described may be placed on reflective surfaces without severe audio coloration caused by reflected sounds.

    Active reverberation augmentation
    4.
    发明授权
    Active reverberation augmentation 有权

    公开(公告)号：US10019981B1

    公开(公告)日：2018-07-10

    申请号：US15612907

    申请日：2017-06-02

    Applicant: Apple Inc.

    Inventor： Simon K. Porter ,  Sylvain J. Choisel ,  John C. Stewart

    IPC: H03G3/00 ,  G10K15/12 ,  H04R3/12 ,  H04R29/00

    CPC classification number: G10K15/12 ,  G10K11/34 ,  H04R3/12 ,  H04R29/002 ,  H04R2201/401 ,  H04S7/301 ,  H04S7/305

    Abstract: A method for using a loudspeaker array that is housed in a loudspeaker cabinet to present audio content to a listener in a room includes receiving (1) an audio channel that includes audio content and (2) acoustical characteristics of the room. The method also produces (1) a first beamformer input signal from the audio channel and (2) a second beamformer input signal and a third beamformer input signal by decorrelating the audio channel and adjusting the audio channel in accordance with the acoustical characteristics of the room. The second and third beamformer input signals are different de-correlated versions of the audio channel. The method also generates driver signals from the first, second, and third beamformer input signals to drive the loudspeaker array to produce a main beam, a first ambient beam, and a second ambient beam, respectively. Other embodiments are also described and claimed.

    LOUDSPEAKER WITH REDUCED AUDIO COLORATION CAUSED BY REFLECTIONS FROM A SURFACE
    5.
    发明申请
    LOUDSPEAKER WITH REDUCED AUDIO COLORATION CAUSED BY REFLECTIONS FROM A SURFACE 审中-公开

    公开(公告)号：US20170280231A1

    公开(公告)日：2017-09-28

    申请号：US15513955

    申请日：2015-09-29

    Applicant: Apple Inc.

    Inventor： Martin E. Johnson ,  Simon K. Porter ,  Suzanne Hardy ,  John H. Sheerin

    IPC: H04R1/28 ,  H04R1/02 ,  H04R1/40

    CPC classification number: H04R1/2811 ,  H04R1/02 ,  H04R1/025 ,  H04R1/26 ,  H04R1/2803 ,  H04R1/288 ,  H04R1/403 ,  H04R3/14 ,  H04R2201/401

    Abstract: Loudspeakers are described that may reduce comb filtering effects perceived by a listener by either 1) moving transducers closer to a sound reflective surface (e.g., a baseplate, a tabletop or a floor) through vertical (height) or rotational adjustments of the transducers or 2) guiding sound produced by the transducers to be released into the listening area proximate to the reflective surface through the use of horns and openings that are at a prescribed distance from the reflective surface. The reduction of this distance between the reflective surface and the point at which sound emitted by the transducers is released into the listening area may lead to shorter reflected path that reduces comb filtering effects caused by reflected sounds that are delayed relative to the direct sound. Accordingly, the loudspeakers shown and described may be placed on reflective surfaces without severe audio coloration caused by reflected sounds.

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