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    Non-blocking dual driver earphones
    14.
    发明授权
    Non-blocking dual driver earphones 有权

    公开(公告)号：US11190867B2

    公开(公告)日：2021-11-30

    申请号：US15941361

    申请日：2018-03-30

    Applicant: MAGIC LEAP, INC.

    Inventor： Brian Lloyd Schmidt ,  David Thomas Roach ,  Michael Z. Land ,  Richard D. Herr

    IPC: H04R1/10 ,  H04R5/033 ,  H04M1/05 ,  H04M1/60 ,  H04S7/00 ,  H04R1/02 ,  G02C11/00 ,  G02C11/06 ,  H04R1/34 ,  H04R1/28 ,  H04R1/26

    Abstract: A head-worn sound reproduction device is provided in the form of left and right earphones, which can either be clipped to each ear or mounted on other headgear. The earphones deliver high fidelity audio to a user's eardrums from near-ear range, in a lightweight form factor that is fully “non-blocking” (allows coupling in and natural hearing of ambient sound). Each earphone has a woofer component that produces bass frequencies, and a tweeter component that produces treble frequencies. The woofer outputs the bass frequencies from a position close to the ear canal, while the tweeter outputs treble frequencies from a position that is either close to the ear canal or further away. In certain embodiments, the tweeter is significantly further from the ear canal than the woofer, leading to a more expansive perceived “sound stage”, but still with a “pure” listening experience.

    Efficient rendering of virtual soundfields
    15.
    发明授权
    Efficient rendering of virtual soundfields 有权

    公开(公告)号：US12120499B2

    公开(公告)日：2024-10-15

    申请号：US18486938

    申请日：2023-10-13

    Applicant: Magic Leap, Inc.

    Inventor： Brian Lloyd Schmidt ,  Samuel Charles Dicker

    IPC: H04S7/00 ,  G10L19/008 ,  G10L25/21 ,  H04S3/00

    CPC classification number: H04S7/303 ,  G10L19/008 ,  G10L25/21 ,  H04S3/008 ,  H04S2400/01 ,  H04S2420/01

    Abstract: An audio system and method of spatially rendering audio signals that uses modified virtual speaker panning is disclosed. The audio system may include a fixed number F of virtual speakers, and the modified virtual speaker panning may dynamically select and use a subset P of the fixed virtual speakers. The subset P of virtual speakers may be selected using a low energy speaker detection and culling method, a source geometry-based culling method, or both. One or more processing blocks in the decoder/virtualizer may be bypassed based on the energy level of the associated audio signal or the location of the sound source relative to the user/listener, respectively. In some embodiments, a virtual speaker that is designated as an active virtual speaker at a first time, may also be designated as an active virtual speaker at a second time to ensure the processing completes.

    SPATIAL AUDIO FOR INTERACTIVE AUDIO ENVIRONMENTS
    20.
    发明申请
    SPATIAL AUDIO FOR INTERACTIVE AUDIO ENVIRONMENTS 有权

    公开(公告)号：US20210152970A1

    公开(公告)日：2021-05-20

    申请号：US17092060

    申请日：2020-11-06

    Applicant: Magic Leap, Inc.

    Inventor： Jean-Marc JOT ,  Samuel Charles Dicker ,  Brian Lloyd Schmidt ,  Remi Samuel Audfray

    IPC: H04S7/00 ,  H04R5/033 ,  H04R5/04 ,  H04S3/00 ,  G10K15/10 ,  H04R3/04 ,  G02B27/01 ,  H04R3/12

    Abstract: Systems and methods of presenting an output audio signal to a listener located at a first location in a virtual environment are disclosed. According to embodiments of a method, an input audio signal is received. For each sound source of a plurality of sound sources in the virtual environment, a respective first intermediate audio signal corresponding to the input audio signal is determined, based on a location of the respective sound source in the virtual environment, and the respective first intermediate audio signal is associated with a first bus. For each of the sound sources of the plurality of sound sources in the virtual environment, a respective second intermediate audio signal is determined. The respective second intermediate audio signal corresponds to a reflection of the input audio signal in a surface of the virtual environment. The respective second intermediate audio signal is determined based on a location of the respective sound source, and further based on an acoustic property of the virtual environment. The respective second intermediate audio signal is associated with a second bus. The output audio signal is presented to the listener via the first bus and the second bus.

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