| 摘要 |
PROBLEM TO BE SOLVED: To provide a crime prevention system capable of quickly warning people at the scene of an accident about the danger or occurrence of any crime. SOLUTION: The crime prevention system has a radio terminal device and a speaker device 200 with a speaker 231 which outputs sound information. The speaker device 200 has an antenna 211 and a receiving part 212 which receive signals by radio, a memory 221 recording the sound information, and a CPU 251 controlling the output of the sound information by the speaker 231. The antenna 211 and the receiving part 212 receive from the radio terminal device a control signal controlling the speaker 231 to output the sound information recorded in the memory 221. Based on the control signal received by the antenna 211 and the receiving part 211, the CPU 251 causes the speaker 231 to output the sound information recorded in the memory 221. COPYRIGHT: (C)2004,JPO
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