Abstract
This paper presents a new method for noise source identification in a multiple noise source environment, where the noise sources may be coherent with each other. It is found, by multi-dimensional spectral analysis, that the major characteristic portion of the noise source is generated by the vibration of the press machine. This analysis is modeled as a multiple input/single output system when the noise generating system of a press machine is very complicated. In this analysis, the concepts of residual spectral analysis and partial coherence function are applied. The relationships between noise sources and radiated sound pressure are computed by micre-computer system. Finally, overall levels for radiated sound pressure obtained by multi-dimensional spectral analysis are compared with those measured.
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