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    VEHICLE LOUDSPEAKERS
    1.
    发明申请
    VEHICLE LOUDSPEAKERS 审中-公开
    车辆扬声器

    公开(公告)号：WO1998016409A1

    公开(公告)日：1998-04-23

    申请号：PCT/GB1997002728

    申请日：1997-10-06

    Applicant: NOISE CANCELLATION TECHNOLOGIES, INC. ,  DAVIS, Gillian, Margaret ,  MCDONALD, Anthony, Malcolm ,  PAIN, Robin, Meredith, Courtney ,  STONE, Martin, James

    Inventor： NOISE CANCELLATION TECHNOLOGIES, INC.

    IPC: B60R11/02

    CPC classification number: B60R11/0223 ,  B60R11/0217 ,  B60R2011/0035 ,  B60R2011/0043 ,  B60R2011/0059 ,  H04M1/6041

    Abstract: A loudspeaker, for example, for an in-vehicle hands-free communication system or an in-vehicle entertainment system is provided as part of a vehicle sun visor (10), or as an attachment (24) to a vehicle sun visor so that the loudspeaker can be placed relatively close to the driver's ears and in front of the driver. Accordingly, there will not be any significant tendency for the driver to turn their head when listening to the loudspeaker. The loudspeaker comprises a flat panel (26) which is driven by a piezoelectric actuator (28), enabling an extremely thin construction to be realised and the loudspeaker to be conveniently integrated into the sun visor, or provided as an unobtrusive attachment for the sun visor.

    Abstract translation: 例如，用于车载免提通信系统或车载娱乐系统的扬声器被提供作为车辆遮阳板（10）的一部分，或作为车辆遮阳板的附件（24），使得 扬声器可以相对靠近驾驶员的耳朵并位于驾驶员的前面。 因此，在收听扬声器时，驾驶员不会有任何显着的倾向。 扬声器包括由压电致动器（28）驱动的平板（26），能够实现非常薄的结构，并且扬声器可以方便地集成到遮阳板中，或者作为遮阳板的不引人注目的附件提供 。

    PIEZO SPEAKER FOR IMPROVED PASSENGER CABIN AUDIO SYSTEMS
    3.
    发明申请
    PIEZO SPEAKER FOR IMPROVED PASSENGER CABIN AUDIO SYSTEMS 审中-公开
    用于改进乘客客舱音响系统的PIEZO扬声器

    公开(公告)号：WO1997017818A1

    公开(公告)日：1997-05-15

    申请号：PCT/US1996015323

    申请日：1996-09-25

    Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.

    Inventor： NOISE CANCELLATION TECHNOLOGIES, INC. ,  EATWELL, Graham, P. ,  PARRELLA, Michael, J. ,  MACHACEK, Steven, L.

    IPC: H04R25/00

    CPC classification number: H04R17/00 ,  H04R7/04

    Abstract: This invention outlines several applications of piezoelectric vibrators (4) to produce quality flat panel speakers in passenger cabin applications. A system consisting of an audio amplifier (2) and transformer (3) is used to drive the piezo speaker (4). The electronics are packaged (8) so that they fit in small modules that can be attached to a cabin structure to produce a speaker. The invention includes a variety of flat panel speaker designs, including one in which the existing structure is converted into a speaker, and thin membrane and/or panels that are fitted with piezoelectric elements (Figures 5 and 6). A system consisting of cabin quieting and flat panel speakers is also discussed where the mid and high frequency audio is produced by panel speakers (74-79) and the low frequency audio is produced from dynamic loudspeakers (80-84). The cabin systems discussed in this patent are applicable to automobiles, aircraft, trucks and buses.

    Abstract translation: 本发明概述了压电振动器（4）的几种应用，以在客舱应用中产生优质的平板扬声器。 由音频放大器（2）和变压器（3）组成的系统用于驱动压电扬声器（4）。 电子设备被封装（8），使得它们适合于可以连接到机舱结构以产生扬声器的小模块中。 本发明包括各种平板扬声器设计，其中包括将现有结构转换成扬声器的设计，以及配有压电元件的薄膜和/或面板（图5和图6）。 还讨论了由面板扬声器（74-79）产生的中高频音频和低频音频由动态扬声器（80-84）产生的由机舱和平板扬声器组成的系统。 本专利中讨论的客舱系统适用于汽车，飞机，卡车和公共汽车。

    ACTIVE VIBRATION REDUCING SYSTEM
    10.
    发明申请
    ACTIVE VIBRATION REDUCING SYSTEM 审中-公开
    主动减振系统

    公开(公告)号：WO1991010226A1

    公开(公告)日：1991-07-11

    申请号：PCT/GB1990002021

    申请日：1990-12-24

    Applicant: NOISE CANCELLATION TECHNOLOGIES INC. ,  ROSS, Colin, Fraser

    Inventor： NOISE CANCELLATION TECHNOLOGIES INC.

    IPC: G10K11/16

    CPC classification number: G10K11/178 ,  G10K2210/121 ,  G10K2210/125 ,  G10K2210/128 ,  G10K2210/1281 ,  G10K2210/12822 ,  G10K2210/129 ,  G10K2210/3019 ,  G10K2210/3032 ,  G10K2210/511

    Abstract: An active vibration reducing system for controlling the vibration generated by a source of periodic or quasi-periodic vibration is characterised in that a weighted sum of the output of at least two sinusoidal waveform generators each synchronised to the frequency of the source of original vibration to generate harmonics of the frequency of the source, is supplied to at least one actuator (5) which generates additional vibration, sensor means (6) is used to monitor the effect of the additional vibration on the original vibration and the weighting of the sum of the outputs is adjusted so that within a defined region the amplitude of the combined vibration is reduced.

    Abstract translation: 用于控制由周期性或准周期性振动源产生的振动的主动减振系统的特征在于，至少两个正弦波形发生器的输出的加权和与每个原始振动源的频率同步以产生 源的频率的谐波被提供给产生附加振动的至少一个致动器（5），传感器装置（6）用于监视附加振动对原始振动的影响，以及 调整输出，使得在限定的区域内组合的振动的振幅减小。

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