| 摘要 |
PROBLEM TO BE SOLVED: To provide a flying object monitoring device capable of sorting and monitoring only a flying object only specified as a monitoring object. SOLUTION: This flying object monitoring device has a sound detecting part 11 detecting sounds generated in a monitoring area, and is constituted to measure a sound pressure level and a frequency of the sounds detected by the sound detecting part 11, and judge that the flying object 14 to be monitored is flying if the sound pressure in a preset specific frequency is larger than a set level. COPYRIGHT: (C)2006,JPO&NCIPI
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