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    REFLECTED SOUND RENDERING USING DOWNWARD FIRING DRIVERS
    4.
    发明申请
    REFLECTED SOUND RENDERING USING DOWNWARD FIRING DRIVERS 有权
    使用下行驱动程序的反射声音渲染

    公开(公告)号：US20170026750A1

    公开(公告)日：2017-01-26

    申请号：US15107031

    申请日：2015-01-06

    申请人： DOLBY LABORATORIES LICENSING CORPORATION

    发明人： Warren MANSFIELD ,  Eugene Edward RADZIK ,  Alan J. SEEFELDT ,  Jared SMITH ,  C. Phillip BROWN ,  Michael SMITHERS

    IPC分类号： H04R5/02 ,  H04R3/14 ,  H04S7/00

    CPC分类号： H04R5/02 ,  H04R1/345 ,  H04R3/14 ,  H04R5/04 ,  H04R2201/021 ,  H04R2201/025 ,  H04R2205/024 ,  H04S7/301 ,  H04S7/305 ,  H04S7/307 ,  H04S2400/11 ,  H04S2420/07

    摘要： Embodiments are directed to speakers and circuits that reflect sound off a wall surface (114) to a listening location at a distance from a speaker. The reflected sound (103) provides direct audio cues to reproduce audio objects that have direct audio components without the need for direct firing speakers. The speaker comprises sideward firing drivers (108) to reflect sound off of the wall surface (114) and represents a virtual direct speaker (116). A virtual direct filter is applied to the sideward-firing driver signal to improve the perception of direct audio transmitted by the sideward firing speaker (108) to provide optimum reproduction of the reflected sound. The virtual direct filter may be incorporated as part of a crossover circuit that separates the full band and sends high frequency sound to the sideward-firing driver (108).

    摘要翻译： 实施例涉及将声音从墙壁表面（114）反射到距扬声器一定距离的收听位置的扬声器和电路。 反射的声音（103）提供直接的音频提示，以再现具有直接音频成分的音频对象，而不需要直接发射扬声器。 扬声器包括侧向击发驱动器（108）以将声音反射离开壁表面（114）并且表示虚拟直接扬声器（116）。 将虚拟直接滤波器应用于侧向发射驱动器信号，以改善由侧向发射扬声器（108）发射的直接音频的感知，以提供反射声音的最佳再现。 虚拟直接滤波器可以被并入作为分离全频带并且将高频声音发送到侧向驱动驱动器（108）的交叉电路的一部分。

    AUTO CALIBRATION OF AN ACTIVE NOISE CONTROL SYSTEM
    5.
    发明申请
    AUTO CALIBRATION OF AN ACTIVE NOISE CONTROL SYSTEM 有权

    公开(公告)号：US20210204054A1

    公开(公告)日：2021-07-01

    申请号：US17265485

    申请日：2019-07-29

    申请人： Dolby Laboratories Licensing Corporation

    发明人： Matthew Conrad FELLERS ,  Louis D. FIELDER ,  Douglas Walter HANSEN ,  Joshua B. LANDO ,  C. Phillip BROWN ,  Rhonda J. WILSON

    IPC分类号： H04R1/10 ,  H04R29/00

    摘要： A method of calibrating a feedback-based noise cancellation system of an ear device may involve obtaining a measured plant response of the ear device, obtaining a reference plant response value and determining a plant response variation between the reference plant response value and a value corresponding to the measured plant response. The method may involve obtaining a measured a coupler response of the ear device, obtaining a reference coupler response value and determining a coupler response variation between the reference coupler response value and a value corresponding to the measured coupler response. The method may involve determining, based at least in part on the plant response variation and the coupler response variation, a microphone signal gain correction factor and applying the microphone signal gain correction factor to ear device microphone signals that are input to a feedback loop of the feedback-based noise cancellation system.

    AUDIO SPEAKERS HAVING UPWARD FIRING DRIVERS FOR REFLECTED SOUND RENDERING
    7.
    发明申请
    AUDIO SPEAKERS HAVING UPWARD FIRING DRIVERS FOR REFLECTED SOUND RENDERING 审中-公开

    公开(公告)号：US20190320283A1

    公开(公告)日：2019-10-17

    申请号：US16452480

    申请日：2019-06-25

    申请人： DOLBY LABORATORIES LICENSING CORPORATION

    发明人： Brett G. CROCKETT ,  Alan J. SEEFELDT ,  C. Phillip BROWN

    IPC分类号： H04S7/00 ,  H04R3/12 ,  H04R3/14 ,  H04R5/04 ,  H04R1/28 ,  H04R1/26 ,  H04R5/02

    摘要： Embodiments are directed to upward-firing speakers that reflect sound off a ceiling to a listening location at a distance from a speaker. The reflected sound provides height cues to reproduce audio objects that have overhead audio components. A virtual height filter based on a directional hearing model is applied to the upward-firing driver signal to improve the perception of height for audio signals transmitted by the virtual height speaker to provide optimum reproduction of the overhead reflected sound. The upward firing driver is tilted at an inclination angle of approximately 20 degrees to the horizontal axis of the speaker and separate height and direct terminal connections are provided to interface to an adaptive audio rendering system.