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    Seismic warning system using RF energy monitor
    1.
    发明授权
    Seismic warning system using RF energy monitor 失效
    使用射频能量监测器的地震预警系统

    公开(公告)号：US4628299A

    公开(公告)日：1986-12-09

    申请号：US695632

    申请日：1985-01-28

    申请人： Joseph B. Tate ,  David E. Brown

    发明人： Joseph B. Tate ,  David E. Brown

    IPC分类号： G08B21/10 ,  G08B21/00

    CPC分类号： G08B21/10

    摘要： The ambient broadband radio frequency field strength from broadcast stations is monitored (FIG. 4) by periodic sampling (50, 52). A warning indication is provided if the field strength drops significantly. Drops in such field strength have been correlated empirically with the occurrence of seismic activity, usually several days later. Thus the indication serves as an early warning of an impending earthquake. In one preferred embodiment, a broadband, horizontal, very long monopole antenna (40) was connected to a rectifying and smoothing circuit (FIG. 3) to provide a dc output proportional to the ambient rf field. This voltage is digitized (50), and using a suitably-programmed computer (52), the digital version of the field strength signal is sampled once per minute (78). A cumulative or running average of the minute samples is calculated (80) and held. Once per hour the latest running average is stored (84) and a standard deviation (SD) of the last 24 hourly stored running averages is calculated (88). If the SD exceeds a predetermined value, 0.3 in one embodiment, an alarm is triggered (92). The use of the SD eliminates the effect of day-to-day changes in the amounts of the variations of the ambient field strength, due to changes in tides and other factors. Once per day the samples are written (96) to a permanent storage file and a continuous plot of the field strength is also made (14). Preferably the alarm is triggered only if another detector also provides an indication (FIG. 6), thereby to eliminate the effect of machine error.

    摘要翻译： 通过周期性采样（50,52）监视来自广播电台的环境宽带射频场强（图4）。 如果场强显着下降，则提供警告指示。 通常在几天之后，这种场强的下降在经验上与地震活动的发生相关。 因此，该指示作为即将发生的地震的早期预警。 在一个优选实施例中，将宽带，水平，非常长的单极天线（40）连接到整流和平滑电路（图3），以提供与环境射频场成比例的直流输出。 该电压被数字化（50），并且使用适当编程的计算机（52），场强信号的数字版本每分钟被采样一次（78）。 计算（80）并保持分数样本的累积或运行平均值。 每小时一次存储最新的运行平均值（84），并计算最后24小时存储的运行平均值的标准差（SD）（88）。 如果SD超过预定值，则在一个实施例中为0.3，触发警报（92）。 SD的使用消除了由于潮汐变化和其他因素导致的环境场强的变化量的日常变化的影响。 每天一次将样品（96）写入永久性存储文件，并且还进行场强的连续绘图（14）。 优选地，仅当另一检测器还提供指示（图6）时触发报警，从而消除机器错误的影响。

    Noise control device
    2.
    发明授权
    Noise control device 有权
    噪音控制装置

    公开(公告)号：US06285772B1

    公开(公告)日：2001-09-04

    申请号：US09357668

    申请日：1999-07-20

    申请人： Joseph B. Tate ,  Steven B. Wolff ,  Vidya Sagar Rao

    发明人： Joseph B. Tate ,  Steven B. Wolff ,  Vidya Sagar Rao

    IPC分类号： H04R2500

    CPC分类号： H04R1/406

    摘要： An apparatus is disclosed for the cancellation of ambient noise that impinges upon the front surface of a pressure differential microphone means. The apparatus utilizes one or more curved surfaces that act as ambient noise waveform reflectors. The reflectors cause ambient noise to impinge on the back surface of the microphone. In addition, the reflectors deflect a speaker's voice which is directed toward the front surface of the microphone to be deflected away from the back surface of the microphone.

    摘要翻译： 公开了用于消除撞击压差麦克风装置前表面的环境噪声的装置。 该装置利用一个或多个曲面，其作为环境噪声波形反射器。 反射器会引起环境噪声撞击麦克风的背面。 此外，反射器偏转扬声器的声音，其指向麦克风的前表面以偏离麦克风的后表面。

    Noise control device
    4.
    发明授权
    Noise control device 失效
    噪音控制装置

    公开(公告)号：US5854848A

    公开(公告)日：1998-12-29

    申请号：US787010

    申请日：1997-01-12

    申请人： Joseph B. Tate ,  Steve B. Wolff

    发明人： Joseph B. Tate ,  Steve B. Wolff

    IPC分类号： H04R1/38 ,  H04M1/03 ,  H04M1/19 ,  H04R1/04 ,  H04R1/08 ,  H04R1/34

    CPC分类号： H04R1/04 ,  H04R1/086 ,  H04R1/342

    摘要： An apparatus for noise cancellation of ambient noise impinging upon the front surface of a pressure differential microphone. The apparatus utilizes curved reflectors to cause ambient noise which impinges on the front surface of the microphone to also impinge on the back surface of the microphone. In addition, the curved reflectors deflect a speaker's voice which is directed toward the front surface of the microphone to be deflected away from the back surface of the microphone.

    摘要翻译： 用于噪声消除撞击压差麦克风前表面的环境噪声的装置。 该装置使用弯曲的反射器来引起环绕在麦克风的前表面上的环境噪声，也会撞击麦克风的背面。 此外，弯曲的反射器偏转扬声器的声音，其指向麦克风的前表面以偏离麦克风的后表面。

    Pluggable noise-controlling apparatus and method
    8.
    发明授权
    Pluggable noise-controlling apparatus and method 有权
    可插拔噪声控制装置及方法

    公开(公告)号：US06396932B1

    公开(公告)日：2002-05-28

    申请号：US09358506

    申请日：1999-07-21

    申请人： Joseph B. Tate ,  Steven B. Wolff ,  Vidya Sagar Rae

    发明人： Joseph B. Tate ,  Steven B. Wolff ,  Vidya Sagar Rae

    IPC分类号： H04B1500

    CPC分类号： H04M1/19

    摘要： A system for controlling noise for a sound receiving device directs noise towards the sound-receiving back side of a bi-directional microphone and directs the user's voice away from the back side. The bi-directional microphone is electrically connected to plug adapted for mating with an external microphone input jack of the sound receiving device. A resistor is connected in series with the bi-directional microphone and operates to attenuate the detected sound signal of the bi-directional microphone in order to overcome signal enhancement expedients of the sound receiving device, such as compression and clipping due to for example automatic gain control.

    摘要翻译： 用于控制声音接收装置的噪声的系统将噪声引导到双向麦克风的声音接收背面，并将用户的声音引导离开背面。 双向麦克风电连接到适于与声音接收装置的外部麦克风输入插孔配合的插头。 电阻器与双向麦克风串联连接，用于衰减双向麦克风的检测到的声音信号，以克服声音接收设备的信号增强方便，例如由于例如自动增益的压缩和限幅 控制。

    Noise control device for a boom mounted noise-canceling microphone
    10.
    发明授权
    Noise control device for a boom mounted noise-canceling microphone 失效
    噪声控制装置，用于吊架安装的降噪麦克风

    公开(公告)号：US6009184A

    公开(公告)日：1999-12-28

    申请号：US115529

    申请日：1998-07-13

    申请人： Joseph B. Tate ,  Steven B. Wolff

    发明人： Joseph B. Tate ,  Steven B. Wolff

    IPC分类号： H04R1/38 ,  H04R1/04 ,  H04R1/08 ,  H04R1/34

    CPC分类号： H04R1/04 ,  H04R1/086 ,  H04R1/342

    摘要： An apparatus for noise cancellation of ambient noise impinging upon the front surface of a pressure differential microphone on the end of a boom. The apparatus utilizes curved reflectors to cause ambient noise which impinges on the front surface of the microphone to also impinge on the back surface of the microphone. In addition, the curved reflectors cause a talker's voice which is directed toward the front surface of the microphone to be deflected away from the back surface of the microphone.

    摘要翻译： 用于噪声消除环境噪声的装置，其撞击在起重臂端部上的压差麦克风的前表面。 该装置使用弯曲的反射器来引起环绕在麦克风的前表面上的环境噪声，也会撞击麦克风的背面。 此外，弯曲的反射器引起朝向麦克风的前表面的讲话者的声音偏离麦克风的后表面。