| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for finding poor corbicula to discriminate whether corbicula is conforming or not by using sound when the corbicula is hit. SOLUTION: The method for finding poor corbicula is used to discriminate whether the corbicula is conforming or not by sound at least at a prescribed frequency band selected from 1,300-1,800 Hz by hitting the corbicula. Further, sound at a prescribed frequency band selected from 900-1,550 Hz, or 2,350-2,750 Hz is preferably included for decision. COPYRIGHT: (C)2006,JPO&NCIPI
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