Noise source extraction method and program

Abstract

To provide a noise source extraction method for extracting a noise source for which noise countermeasures are required further efficiently.SOLUTION: A noise source extraction method for extracting a noise source for which noise countermeasures are required includes: an initial setting step for setting, for each sound receiving point, a limit value of a noise level and a contribution value of the noise level of each noise source to the sound receiving point; a target value setting step for setting, for each sound receiving point, a target value of the contribution value necessary to achieve the limit value based on the limit value and the number of noise sources; a discriminating step for discriminating, for each sound receiving point, between an achieved noise source whose contribution value achieves the target value and an unachieved noise source whose contribution value does not achieve the target value; and a resetting step for resetting the target value based on the limit value, the contribution value of the achieved noise source, and the number of unachieved noise sources for the sound receiving point having at least the unachieved noise source. After the resetting step, the discriminating step is performed, and the resetting step and the discriminating step are repeated until an end condition is satisfied.SELECTED DRAWING: Figure 5

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