| 摘要 |
PROBLEM TO BE SOLVED: To provide an acoustic intensity measurement device and a measurement method, capable of calculating the acoustic intensity of a measurement object, without having to measure a plurality of measurement-area sound pressures. SOLUTION: A microphone array 1 is structured from a plurality of microphones 3 and is disposed opposite the measurement object at a prescribed distance. The sound pressure value is recorded in a microphone sound pressure storage means 6 for each microphone 3 of the microphone array 1. The acoustic intensity measurement device is provided with an acoustic intensity calculation means 7 for calculating the acoustic intensity from the sound pressure value for each microphone 3. The acoustic intensity calculation means 7 is provided with a measurement area dividing section 8, in which a lattice point where three planes, including a set calculation object reference plane are divided, is made as a sound-pressure measurement point; a sound-pressure distribution calculation section 9 for calculating the sound-pressure value by obtaining weighted average of the sound-pressure values for each lattice point; and an acoustic intensity distribution calculating section 10 for calculating the acoustic intensity from the sound-pressure value of the plurality of lattice points for each lattice point on the calculation object reference plane. COPYRIGHT: (C)2007,JPO&INPIT
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