| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a voice guidance system that can be used for a long time, makes it possible for people who lines up 10 m or longer for an event to hear an explanation for a display body, and causes no radio interference with an explanation for an adjacent display body even when the display bodies are close to each other. <P>SOLUTION: The voice guidance system which uses FM radio sets solves the problem mentioned above, and makes good use of the (masking) effect that when there are radio waves having the same carrier frequency, the intenser radio wave is selected as characteristics of frequency modulation (FM) to prevent radio interference and also uses the ordinary FM radio sets put on the market to be used by many unspecified people. The system is applicable to not only a stationary display, but also a moving display body, and the audible range can be controlled by adjusting the output etc., to cover the length of a moving queue. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
