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1. 发明授权

US5185803A Communication system for passenger vehicle 失效
标题翻译：客车通信系统
公开(公告)号：US5185803A
公开(公告)日：1993-02-09
申请号：US812298
申请日：1991-12-23
申请人： Matthew T. Moyski , Raymond C. Spitz
发明人： Matthew T. Moyski , Raymond C. Spitz
IPC分类号： H04B1/00
CPC分类号： H04B1/00
摘要： The invention enhances the ability of rear seat passengers in a vehicle to hear the speech of a front seat occupant. Two spaced microphones in the front seat area pick up speech signals which are differentially amplified and filtered in a bandpass filter and at least one notch filter. The filter signals are reproduced through speakers in the area of the rear seat. Differential amplification of the microphone signals results in greatly reduced acoustic feedback from the speakers to the microphones. The communication system of the invention is highly integrated into other communication and audio systems in the vehicle.
摘要翻译：本发明增强了后排乘客在车辆中听到前座乘客的讲话能力。前座区域中的两个间隔麦克风拾取在带通滤波器和至少一个陷波滤波器中进行差分放大和滤波的语音信号。过滤器信号通过位于后排座椅区域的扬声器再现。麦克风信号的差分放大可大大降低从扬声器到麦克风的声反馈。本发明的通信系统高度集成到车辆中的其他通信和音频系统中。

2. 发明授权

US4972275A Wideband radio-frequency broadcast recorder and radio testing system 失效
标题翻译：宽带射频广播录音机和无线电测试系统
公开(公告)号：US4972275A
公开(公告)日：1990-11-20
申请号：US313935
申请日：1989-02-22
申请人： Raymond C. Spitz , Shinji Kakuyama
发明人： Raymond C. Spitz , Shinji Kakuyama
IPC分类号： G11B31/00 , H04B7/06 , H04B7/08 , H04B17/00 , H04H20/12 , H04N5/765
CPC分类号： H04N5/765 , H04B17/0085 , H04H20/12
摘要： A tape recording apparatus in the form of a modified VCR is employed to record broadcast signals received by an antenna while moving through a radio-broadcast reception area. The recorded signals are maintained in an undetected, modulated-carrier form so that played-back signals from the VCR can be coupled to a radio receiver in a fixed location for testing under mobile conditions. A commercially available VCR is modified to avoid modulating FM signals by frequency a second time.
摘要翻译：采用经修改的VCR形式的磁带记录装置，用于在通过无线电广播接收区域移动的同时记录由天线接收的广播信号。记录的信号被保持在未被检测的调制载波形式中，使得来自VCR的播放信号可以耦合到固定位置的无线电接收机，以在移动条件下进行测试。修改市售的VCR以避免频率调制FM信号第二次。

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