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    Self calibrating multi-element dipole microphone
    4.
    发明授权
    Self calibrating multi-element dipole microphone 有权

    公开(公告)号：US09699582B2

    公开(公告)日：2017-07-04

    申请号：US14468420

    申请日：2014-08-26

    Applicant: VOCOLLECT, Inc

    Inventor： John Sheerin ,  Richard Sharbaugh ,  Matthew Shope

    IPC: H04R29/00 ,  H04R1/10 ,  H04R3/00

    CPC classification number: H04R29/004 ,  H04R1/1083 ,  H04R3/005

    Abstract: A self calibrating dipole microphone formed from two omni-directional acoustic sensors. The microphone includes a sound source acoustically coupled to the acoustic sensors and a processor. The sound source is excited with a test signal, exposing the acoustic sensors to acoustic calibration signals. The responses of the acoustic sensors to the calibration signals are compared by the processor, and one or more correction factors determined. Digital filter coefficients are calculated based on the one or more correction factors, and applied to the output signals of the acoustic sensors to compensate for differences in the sensitivities of the acoustic sensors. The filtered signals provide acoustic sensor outputs having matching responses, which are subtractively combined to form the dipole microphone output.

    SELF CALIBRATING MULTI-ELEMENT DIPOLE MICROPHONE
    6.
    发明申请
    SELF CALIBRATING MULTI-ELEMENT DIPOLE MICROPHONE 审中-公开
    自校准多元素双极麦克风

    公开(公告)号：US20140369511A1

    公开(公告)日：2014-12-18

    申请号：US14468420

    申请日：2014-08-26

    Applicant: VOCOLLECT, Inc.

    Inventor： John Sheerin ,  Rich Sharbaugh ,  Matthew Shope

    IPC: H04R29/00

    CPC classification number: H04R29/004 ,  H04R1/1083 ,  H04R3/005

    Abstract: A self calibrating dipole microphone formed from two omni-directional acoustic sensors. The microphone includes a sound source acoustically coupled to the acoustic sensors and a processor. The sound source is excited with a test signal, exposing the acoustic sensors to acoustic calibration signals. The responses of the acoustic sensors to the calibration signals are compared by the processor, and one or more correction factors determined. Digital filter coefficients are calculated based on the one or more correction factors, and applied to the output signals of the acoustic sensors to compensate for differences in the sensitivities of the acoustic sensors. The filtered signals provide acoustic sensor outputs having matching responses, which are subtractively combined to form the dipole microphone output.

    Abstract translation: 由两个全向声学传感器组成的自校准偶极麦克风。 麦克风包括声学耦合到声学传感器的声源和处理器。 声源被测试信号激发，将声学传感器暴露于声学校准信号。 通过处理器比较声学传感器对校准信号的响应，并确定一个或多个校正因子。 基于一个或多个校正因子计算数字滤波器系数，并将其应用于声学传感器的输出信号以补偿声学传感器的灵敏度差异。 经滤波的信号提供具有匹配响应的声学传感器输出，其被相减组合以形成偶极麦克风输出。

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