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    PIEZOELECTRIC TRANSDUCERS
    71.
    发明申请
    PIEZOELECTRIC TRANSDUCERS 审中-公开
    压电传感器

    公开(公告)号：WO1997017820A1

    公开(公告)日：1997-05-15

    申请号：PCT/US1996017602

    申请日：1996-11-04

    Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.

    Inventor： NOISE CANCELLATION TECHNOLOGIES, INC. ,  WARNAKA, Glenn, E. ,  WARNAKA, Mark, E.

    IPC: H04R25/00

    CPC classification number: H04R17/00 ,  H04R7/045

    Abstract: The invention consists of a piezoelectric material (11), a substrate or spacer (12) and an electrical connector means (13) for a wire harness or other electrical connection. The substrate (12) is used to enhance the motion of the piezoelectric element (11) by spacing the piezoelectric element (11) from the diaphragm. The substrate (12) is larger in area than the piezoelectric element (11). The transducer system (10) acts to impart motion to the diaphragm. The transducer (10) comprises a piezoelectric element (11) subject to displacement by applied electric potential (13) that has a top side, an underside and an outer perimeter. The substrate (12) is joined to the underside of the piezoelectric element (11). A means (15) applies electric potential to the piezoelectric element (11).

    Abstract translation: 本发明由压电材料（11），基底或间隔件（12）和用于线束或其它电连接的电连接器装置（13）组成。 衬底（12）用于通过将压电元件（11）与隔膜隔开来增强压电元件（11）的运动。 基板（12）的面积大于压电元件（11）。 换能器系统（10）用于赋予隔膜运动。 换能器（10）包括通过施加的电位（13）进行位移的压电元件（11），其具有顶侧，下侧和外周。 基板（12）与压电元件（11）的下侧接合。 一种装置（15）将电位施加到压电元件（11）上。

    ACTIVE NOISE ATTENUATED DSP UNIT
    73.
    发明申请
    ACTIVE NOISE ATTENUATED DSP UNIT 审中-公开
    主动噪声衰减DSP单元

    公开(公告)号：WO1995024876A1

    公开(公告)日：1995-09-21

    申请号：PCT/US1995002704

    申请日：1995-03-10

    Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.

    Inventor： NOISE CANCELLATION TECHNOLOGIES, INC. ,  DENENBERG, Jeffrey, N.

    IPC: A61F11/06

    CPC classification number: H04B15/00

    Abstract: An active control system adapted to provide control element to at least one appliance (blower) to be quieted through the power connection (ac power and signals). The system comprising an active noise control element (50-52, 54-56) associated with a power distribution network (ac power), at least one appliance (blower) to be quieted, and a power connection (ac power and signals) connected between the control element and the appliance (blower) adapted to convey noise control signals from the control element to the appliance (blower) and a residual noise signal from the appliance (blower) back to the control element.

    Abstract translation: 一种主动控制系统，适用于通过电力连接（交流电源和信号）安静地至少一个设备（鼓风机）提供控制元件。 该系统包括与配电网络（交流电源）相关联的主动噪声控制元件（50-52,54-56），要安静的至少一个设备（鼓风机）和连接的电力连接（交流电源和信号） 控制元件和适于将来自控制元件的噪声控制信号传送到器具（鼓风机）的设备（鼓风机）和来自设备（鼓风机）的残余噪声信号返回到控制元件之间。

    IN-PIPE MICROPHONE SYSTEM FOR ACTIVE NOISE CANCELLATION
    74.
    发明申请
    IN-PIPE MICROPHONE SYSTEM FOR ACTIVE NOISE CANCELLATION 审中-公开
    用于主动噪声消除的管内麦克风系统

    公开(公告)号：WO1995024109A1

    公开(公告)日：1995-09-08

    申请号：PCT/US1995002436

    申请日：1995-03-01

    Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.

    Inventor： NOISE CANCELLATION TECHNOLOGIES, INC. ,  BISCHOFF, Lance, B. ,  MEEKS, Timothy, E.

    IPC: H04R25/00

    CPC classification number: H04R1/342

    Abstract: A low sensitivity microphone system for cancelling noise within a pipe system (1, 5) which includes a flexible attenuation diaphragm (6) within the pipe to reduce the pressure level and a transducer (7) to produce a voltage corresponding to the lowered level.

    Abstract translation: 一种低灵敏度麦克风系统，用于消除管道系统（1,5）内的噪声，该系统包括在管道内的柔性衰减隔膜（6）以降低压力水平，以及换能器（7）以产生对应于降低的水平的电压。

    TRACKING FILTER FOR PERIODIC SIGNALS
    75.
    发明申请
    TRACKING FILTER FOR PERIODIC SIGNALS 审中-公开
    跟踪用于定期信号的过滤器

    公开(公告)号：WO1995020812A1

    公开(公告)日：1995-08-03

    申请号：PCT/US1995001038

    申请日：1995-01-26

    Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.

    Inventor： NOISE CANCELLATION TECHNOLOGIES, INC. ,  EATWELL, Graham, P. ,  YAN, Yong, J.

    IPC: G10K11/16

    CPC classification number: H03H11/1291 ,  H03H17/0251

    Abstract: A method for designing a frequency periodic filter with a frequency response which has a periodic bandwidth including designing a first sampled data filter whose response corresponds to a set period and replacing each unit sampling delay (46) by a second data filter.

    Abstract translation: 一种用于设计具有频率响应的频率周期滤波器的方法，所述频率响应具有周期性带宽，包括设计响应对应于设定周期的第一采样数据滤波器，并且通过第二数据滤波器代替每个单位采样延迟（46）。

    INERTIAL COUPLING MOUNT
    77.
    发明申请
    INERTIAL COUPLING MOUNT 审中-公开
    惯性耦合装置

    公开(公告)号：WO1994027083A1

    公开(公告)日：1994-11-24

    申请号：PCT/US1994005215

    申请日：1994-05-11

    Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.

    Inventor： NOISE CANCELLATION TECHNOLOGIES, INC. ,  MILLER, Scott, K. ,  LANGLEY, Andrew, J.

    IPC: F16M01/00

    CPC classification number: F16F13/06 ,  F16F7/10 ,  F16F15/027

    Abstract: An inertial coupling mount with active vibration isolation means between the source of vibration and the base to which it is mounted is disclosed. Inertial coupling (30) in series with actuator (4) provides vibration control force to effect high-frequency, engine-induced, vibration reduction. Coupling (30) reduces displacements to which actuator (4) is exposed, enabling effective control throughout very large, road-induced mount displacements, while at the same time protecting the actuator.

    Abstract translation: 公开了一种在振动源与其安装的基座之间具有主动隔振装置的惯性联轴器安装件。 与执行器（4）串联的惯性联轴器（30）提供振动控制力，以实现高频，发动机引起的减振。 耦合（30）减少了致动器（4）暴露的位移，从而在非常大的道路引导的安装位移中进行有效的控制，同时保护执行器。

    ACTIVE ACOUSTIC TRANSMISSION LOSS BOX
    78.
    发明申请
    ACTIVE ACOUSTIC TRANSMISSION LOSS BOX 审中-公开
    主动声传输损失箱

    公开(公告)号：WO1994009484A1

    公开(公告)日：1994-04-28

    申请号：PCT/US1992008401

    申请日：1992-10-08

    Applicant: NOISE CANCELLATION TECHNOLOGIES, INC. ,  FULLER, Chris ,  McLOUGHLIN, Michael ,  HILDEBRAND, Steve

    Inventor： NOISE CANCELLATION TECHNOLOGIES, INC.

    IPC: G10K11/16

    CPC classification number: G10K11/178 ,  G10K2210/102 ,  G10K2210/103 ,  G10K2210/106 ,  G10K2210/119 ,  G10K2210/127 ,  G10K2210/129 ,  G10K2210/3026 ,  G10K2210/3046 ,  G10K2210/3216 ,  G10K2210/3224 ,  G10K2210/32291

    Abstract: The invention relates to noise or sound control achieved by enclosing the noise source in an active enclosure (10). Arrays of vibration inputs such as shakers, piezoceramic, etc. (14, 15) are attached to the walls of the active enclosure, or loudspeakers located inside the enclosure can be used to excite the sites of the enclosure. An array of error microphones are located in the radiated acoustic field or PVDF strips (20, 21, 22) are positioned on the wall. A controller (19) senses the levels of sound observed at the error microphones (16, 17, 18) or PVDF film (20, 21, 22) and adjusts the oscillating inputs (in terms of frequency, content, phase and magnitude) to the active vibration inputs in order to minimize the radiated sound.

    Abstract translation: 本发明涉及通过将噪声源包围在有源外壳（10）中来实现的噪声或声音控制。 诸如振动器，压电陶瓷等的振动输入阵列（14,15）附接到有源外壳的壁上，或者可以使用位于外壳内的扬声器来激发外壳的位置。 一组错误麦克风位于辐射声场中，或PVDF条（20,21,22）位于墙上。 控制器（19）感测在误差麦克风（16,17,18）或PVDF膜（20,21,22）处观察到的声音水平，并且将振荡输入（以频率，内容，相位和幅度计）调整到 主动振动输入，以最小化辐射声音。

    SAMPLED-DATA FILTER WITH LOW DELAY
    79.
    发明申请
    SAMPLED-DATA FILTER WITH LOW DELAY 审中-公开
    采样数据滤波器具有低延迟

    公开(公告)号：WO1994007212A1

    公开(公告)日：1994-03-31

    申请号：PCT/US1992007802

    申请日：1992-09-21

    Applicant: NOISE CANCELLATION TECHNOLOGIES, INC. ,  EATWELL, Graham

    Inventor： NOISE CANCELLATION TECHNOLOGIES, INC.

    IPC: G06J01/00

    CPC classification number: H03H17/0283

    Abstract: A filter system with low throughput delay having at least two parallel filters, either sampled-data or continuous, wherein one of the filters has a low throughput delay in comparison with the other filters.

    Abstract translation: 具有低吞吐量延迟的滤波器系统具有至少两个采样数据或连续的并行滤波器，其中与其它滤波器相比，滤波器之一具有低吞吐量延迟。

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