| 摘要 |
PROBLEM TO BE SOLVED: To inhibit virtual image sound source component reflected in measured result in the acoustic measuring device with a microphone array. SOLUTION: Microphones 11 are deployed at each grid point forming a two-dimensional triangular grid of an equilateral triangle by each grid point to compose a microphone array 2. Also, for a measuring target frequency bandpass each measurement property is established so as to form virtual images out of a measured angular extent. An acoustic pressure distribution analyzing section 5 computes acoustic pressure level distribution of each direction within the measured angular extent by the use of a beam former method and the like from an acoustic pressure level for each frequency bandpass of each microphone computed from multichannel FET 4, while an acoustic pressure distribution level outputting section displays the acoustic level distribution imageries showing the acoustic pressure level distribution for the frequency bandpass specified by user in respond to user's operation on a display device 8 through a GUI controller 7. COPYRIGHT: (C)2007,JPO&INPIT
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