| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fire alarm that prevents disaster and crime. Ž<P>SOLUTION: A control unit 1 set to a crime prevention mode outputs living sound from a loudspeaker 5 when no fire is detected at a fire detector 2. It seems as if someone is at home even when no one is at home, thereby preventing crimes such as sneak thief. Unlike a conventional alarm turning on/off a light, it seems as if someone is at home not only during the night but also during the day. Accordingly, the fire alarm can be used for preventing disasters as well as preventing crimes. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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