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    LOUDSPEAKER WITH REDUCED AUDIO COLORATION CAUSED BY REFLECTIONS FROM A SURFACE
    26.
    发明申请
    LOUDSPEAKER WITH REDUCED AUDIO COLORATION CAUSED BY REFLECTIONS FROM A SURFACE 审中-公开

    公开(公告)号：US20200221216A1

    公开(公告)日：2020-07-09

    申请号：US16822474

    申请日：2020-03-18

    Applicant: Apple Inc.

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

    IPC: H04R1/28 ,  H04R1/40 ,  H04R1/02 ,  H04R1/26 ,  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.

    Audio systems with smooth directivity transitions
    27.
    发明授权
    Audio systems with smooth directivity transitions 有权

    公开(公告)号：US10237645B2

    公开(公告)日：2019-03-19

    申请号：US15619058

    申请日：2017-06-09

    Applicant: Apple Inc.

    Inventor： Afrooz Family ,  John H. Sheerin

    IPC: H04R1/02 ,  H04R1/40 ,  H04R3/12 ,  H04R3/04 ,  H03G5/16 ,  H04R3/00

    Abstract: An audio system includes a loudspeaker cabinet defining a longitudinal axis. Several loudspeaker transducers are distributed around the longitudinal axis. The audio system includes an audio rendering processor to cause the loudspeaker transducers to emit a sound field approximating a desired contour. The desired contour can be decomposed into a combination of several constituent modal beam components, and the audio rendering processor can render a truncated version of the decomposition to render an approximation of the desired contour. The desired contour can be one of a plurality of contours stored in a memory, or can be user defined. The cabinet includes a processor and a memory having instructions that, when executed by the processor, cause the audio system decompose a desired contour and to render a truncated version of the decomposition. Related principles are described by way of reference to method and apparatus examples.

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