| 摘要 |
PROBLEM TO BE SOLVED: To provide an acoustic measuring device and an acoustic physical quantity measuring method capable of measuring the volume, surface area, leak, or the like of a measurement object without using a microphone having precisely tuned characteristics. SOLUTION: Drive signals Sig1, Sig2 for driving drive means 30, 40, respectively, are controlled so that the differential pressure between a pressure in a reference container 10 and a pressure in a container 20 to be measured is zero by acoustically driving the inside of the reference container 10 by the driving means 30 and by driving the inside of the container 20 to be measured accommodating the measurement object M by the driving means 40. The volume, surface area, leak, or the like of the measurement object M is measured on the basis of a ratio of acoustic impedances between the reference container 10 and the container 20 to be measured or a value corresponding thereto at that time. COPYRIGHT: (C)2011,JPO&INPIT
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