The inversion method was used to test vibroacoustic processes in large-size machines used in opencast mines of rock material. When this method is used, the tested machine is replaced with a set of substitute sources, whose acoustic parameters are determined on the basis of sound pressure levels and phase shift angles of acoustic signals, measured with an array of 24 microphones. This article presents test results of a combine unit comprising a crusher and a vibrating sieve, for which an acoustic model of 7 substitute sources was developed with the inversion method.
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Increased possibilities of parallel acquiring data and transforming them effectively together with the improvement of calculation tools made the inverse methods more important. Some examples of research, carried out by the author, during, which the possibilities of localization of increased vibroactivity areas were studied using the multi-microphone method, are presented in the paper. The theoretical basis of the inversion method of sound sources localization and certain laboratory test results are also given.
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The basic problems concerning the inversion methods are presented in the paper. The inverse methods have a great applications in many fields of sciences (geophysics, medicine, mechanics, vibroacoustics, oceanography). The paper presented also the contribution of polish scientists in inversion methods.
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