| 摘要 |
PROBLEM TO BE SOLVED: To provide an oscillatory wave determining device capable of improving determination accuracy by allowing setting of a highly accurate threshold. SOLUTION: The oscillatory wave determining device is provided with an oscillatory wave inputting means 2 for detecting and inputting an oscillatory wave generated during operation of an object, a frequency separation means 6 for forming a first time series signal per each predetermined frequency band by carrying out frequency separation on the inputted oscillatory wave, a signal processing means 7 for extracting a second time series signal per each predetermined frequency band with a target operation noise showing a predetermined operating state of the object from the first time series signal, a determining means 9 for determining a state of the object on the basis of a threshold and sound pressure information of the target operation noise determined from the second time series signal, and a correcting means 20 for correcting the threshold in response to a determination result of the determining means 9. COPYRIGHT: (C)2004,JPO&NCIPI
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