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1. 发明授权

US5533959A Wireless remote monitors employing reassurance tones 失效
标题翻译：无线遥控显示器采用保证音
公开(公告)号：US5533959A
公开(公告)日：1996-07-09
申请号：US199943
申请日：1994-02-22
申请人： Perran V. L. Newman , Niel P. Zeller , Dwight D. Ifland
发明人： Perran V. L. Newman , Niel P. Zeller , Dwight D. Ifland
IPC分类号： G08B29/02 , G08B23/00
CPC分类号： G08B29/02
摘要： A wireless audio monitoring system includes a reassurance tone generator for providing the user with assurance that a receiving unit is within range of the monitoring unit's transmitter and that both are operating properly. The reassurance signal is a brief audible tone transmitted at regular intervals by the monitoring unit to the receiving unit. The reassurance tone is either injected as sound into the monitoring unit's microphone, as an electronic signal into the microphone's amplifier or directly into the transmitter. A typical reassurance tone is a quarter-second long audible tone that occurs every ten seconds. At the receiving unit, the user has the option of either hearing or not hearing the reassurance tone by either eliminating the tone itself or by muting the loudspeaker during the time the reassurance tone is being received. Alternatively, the reassurance tone is turned on or off at the monitoring unit by means of a radio control signal sent from the receiving unit.
摘要翻译：无线音频监控系统包括一个保证音发生器，用于向用户提供接收单元在监视单元的发射机的范围内并且两者正常工作的保证。保证信号是由监视单元以规则的间隔发送到接收单元的简短可听音。保证音被作为声音注入到监控单元的麦克风中，作为电子信号输入到麦克风的放大器中，或直接放入发射机。典型的安心音是每十秒钟发生一次四分之一秒长的可听音。在接收单元处，用户可以通过消除音调本身或通过在接收到保证音之前使扬声器静音来听取或不听到保证音。或者，通过从接收单元发送的无线电控制信号，在监视单元处打开或关闭确认音。

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