| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and device for analyzing, with high accuracy the degree of the effect of each of plural sound sources distributed over a wide range on the noise at a noise evaluation point. SOLUTION: Plural adaptive filters 5, in which the output signal of a plurality of sound source searching microphones is inputted, and a convergence calculation means 8 for calculation where the factor of adaptive filters is so updated that the waveform of sum of output signals of the plurality of adaptive filters agrees with the waveform of the output signal of the evaluation point microphone installed at a noise evaluation point, are provided. Furthermore, a delay circuit 3 is provided which delays the output signal of the sound source searching microphone by the direct wave reach time, which depends on the distance between each sound source and a noise evaluation point.
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