And collection device
    96.
    发明专利

    公开(公告)号:JP5028786B2

    公开(公告)日:2012-09-19

    申请号:JP2005320043

    申请日:2005-11-02

    Inventor: 田中  良

    CPC classification number: H04R1/403 H04R1/406 H04R2201/403 H04R2201/405

    Abstract: In a microphone apparatus adapted to an audio signal transmission/reception device including a speaker array for linearly arranging a plurality of speaker units and a microphone array for linearly arranging a plurality of microphone units, the plurality of microphone units are partially aligned with the equal spacing corresponding to a prescribed distance therebetween in a high-density alignment section that is set symmetrical to an alignment origin corresponding to a center point of linear alignment, and remaining ones within the plurality of microphone units are aligned in a low-density alignment section externally of the high-density alignment section in such a way that the spacing therebetween is sequentially broadened and is set integer times larger than the prescribed distance. Thus, it is possible to reduce the manufacturing cost by reducing the total number of the microphone units, and it is possible to improve sound reception directivity with respect to both of a high frequency band and a low frequency band.

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