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    SOUND SYSTEM
    3.
    发明公开
    SOUND SYSTEM 审中-公开

    公开(公告)号：US20230377550A1

    公开(公告)日：2023-11-23

    申请号：US18031135

    申请日：2020-10-28

    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    Inventor： Masahiro FUKUI ,  Kazunori KOBAYASHI ,  Noriyoshi KAMADO

    IPC: G10K11/178

    CPC classification number: G10K11/17823 ,  G10K11/17881 ,  G10K2210/3044 ,  G10K11/17825 ,  G10K2210/3026 ,  G10K2210/3046 ,  G10K2210/3224 ,  G10K2210/128 ,  G10K2210/3027 ,  G10K2210/509

    Abstract: A sound system includes: a control system that generates a control signal for erasing noise from a signal of the noise in a place close to a head of a user who uses a seat; a silencing speaker system that is installed at the place close to the head of the user who uses the seat and includes M speaker units each emitting a sound based on the control signal; and an emission suppression unit including at least a sound absorbing material that easily absorbs only a sound having a frequency greater than or equal to a predetermined value and configured to make it difficult for the sound having the frequency greater than or equal to the predetermined value emitted from the silencing speaker units to be emitted to a place other than an ear of the user. The m-th silencing speaker unit is arranged so that a sound emitted from the m-th silencing speaker unit in the m-th silencing user direction is silenced at a place other than a place close to the head of the user who uses the seat due to coming around of a sound emitted from the m-th silencing speaker unit in a direction opposite to the m-th silencing user direction.

    Generating quiet zone by noise cancellation via injection techniques
    8.
    发明授权
    Generating quiet zone by noise cancellation via injection techniques 有权

    公开(公告)号：US09829580B2

    公开(公告)日：2017-11-28

    申请号：US15358132

    申请日：2016-11-22

    Applicant: SPATIAL DIGITAL SYSTEMS, INC.

    Inventor： Donald C. D. Chang ,  Michael T. H. Lin ,  Steve Chen

    IPC: G01S19/21 ,  G10K11/178

    CPC classification number: G01S19/215 ,  G10K11/178 ,  G10K11/34 ,  G10K11/341 ,  G10K2210/12 ,  G10K2210/128 ,  G10K2210/3215

    Abstract: A system for reducing undesired interference in a target zone is disclosed. The system comprises a set of M pickup sensors, a beam forming network coupled to the M pickup sensors, and a set of N injectors coupled to the beam forming network. The M pickup sensors pick up undesired signals in real time and generate M pickup signals, M being an integer greater than or equal to 1. The beam forming network comprises a set of M beam forming modules. Each of the M beam forming modules receives a respective one of the M pickup signals and generates N intermediate signals, N being an integer greater than 1. The N intermediate signals generated by each of the M beam forming modules are combined correspondingly with remaining intermediate signals generated by remaining M−1 beam forming modules to generate N interference signals. The N injectors receive and radiate the N interference signals to the target zone.

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