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 。

公开(公告)号：WO1986007474A1

公开(公告)日：1986-12-18

申请号：PCT/GB1986000325

申请日：1986-06-06

Applicant: DAVIS, Gillian, Margaret ,  ROSS, Ian, Norman

IPC: G03H01/00

CPC classification number: G03H1/22

Abstract: Apparatus for the production of large area high resolution images of a holographic mask comprises an excimer laser (7) and beam expander (L1, L4, M6, M5) to direct a beam on to a reflection hologram (H) located near the image plane of the mask. The image of the mask is formed by reflection in a concave mirror (M4).

公开(公告)号：WO1998028942A1

公开(公告)日：1998-07-02

申请号：PCT/GB1997003090

申请日：1997-11-11

Applicant: NOISE CANCELLATION TECHNOLOGIES, INC. ,  DAVIS, Gillian, Margaret ,  LUNDIE, Thomas ,  MCDONALD, Anthony, Malcolm

Inventor： NOISE CANCELLATION TECHNOLOGIES, INC.

IPC: H04R07/06

CPC classification number: H04R7/06 ,  H04R1/26 ,  H04R1/403 ,  H04R17/00

Abstract: An electroacoustic transducer comprises first and second panels (18A, 18B) each of which can be vibrated to generate sound, a frame (10) for mounting the panels, and first and second seals (20A, B) arranged between the frame and the edges of the panels for holding the panels in the frame, substantially isolating the frame acoustically from the edges of the panel, and substantially sealing the frame to the edges of the panel. One or more actuators (22), such as piezoelectric elements, are provided for receiving a driving signal and vibrating in response thereto, and the actuators are mechanically and acoustically coupled to the first panel at one or more locations remote from the edges of the first panel so that the first panel vibrates in response to vibration of the actuators. The second panel is mechanically and acoustically coupled to the first panel and/or to the actuators at one or more locations remote from the edges of the second panel so that the second panel also vibrates in response to vibration of the actuator means. The acoustic properties of the panels, the seals, the actuators and the couplings can be chosen to obtain a required frequency response from the transducer. Different embodiments are described in which the panels are driven in phase, in anti-phase, and in a more complex manner.

Abstract translation: 电声换能器包括第一和第二面板（18A，18B），每个面板可以被振动以产生声音，用于安装面板的框架（10）以及布置在框架和边缘之间的第一和第二密封件（20A，B） 的面板用于将面板保持在框架中，基本上将框架与面板的边缘声学隔离，并且基本上将框架密封到面板的边缘。 提供一个或多个诸如压电元件的致动器（22），用于接收驱动信号并响应于此而致动振动，并且致动器在远离第一和第二部分的边缘的一个或多个位置处机械地和声学地耦合到第一面板 使得第一面板响应于致动器的振动而振动。 第二面板在远离第二面板的边缘的一个或多个位置处机械地和声学地耦合到第一面板和/或致动器，使得第二面板也响应于致动器装置的振动而振动。 可以选择面板，密封件，致动器和联接器的声学特性以从换能器获得所需的频率响应。 描述了不同的实施例，其中面板以同相，反相方式并且以更复杂的方式被驱动。