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The Inversion Method in Measuring Noise Emitted by Machines in Opencast Mines of Rock Material

Pleban D., Piechowicz J., Kosała K.

International Journal of Occupational Safety and Ergonomics

2013

Vol. 19, No. 2

321--331

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.

Localization of areas of increased vibroactivity by means of the inverse method

Stryczniewicz L.

Archives of Acoustics

2007

Vol. 32, No. 2

377-386

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.

Metody inwersyjne i ich prekursorzy

Engel Z. W., Engel J. R.

Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika

2005

z. 65 [222]

99-108

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.