| 摘要 |
PROBLEM TO BE SOLVED: To provide a disaster prevention monitoring system capable of reducing the psychological burden on community residents and workers when a rumbling test of community sounds is performed.SOLUTION: The disaster prevention monitoring system includes a rumble control unit 30 for controlling the driving voltages of community acoustic devices 14a, 14b, and 14c. The rumble control unit 30 rumbles the community acoustic devices 14a, 14b, and 14c in a period for rumbling the community acoustic devices so that the period includes a period in which driving is performed at a first voltage for generating a sound in rumbling when an actual fire occurs and a period in which driving is performed at a second voltage lower than the first voltage.SELECTED DRAWING: Figure 1 |
