Noise sources identification in machines and mechanical devices

Downloads

Authors

  • Czesław CEMPEL Poznań University of Technology, Poland
  • Urszula KOSIEL Poznań University of Technology, Poland

Abstract

This paper presents a method for the determination of noise sources locations in machines and mechanical devices. It also describes a method for the determination of the nature of these noise sources and their effect on the overall noise. The former is based on the properties of the frequency band correlation function, the latter on the properties of the coherence function. It is shown that these two methods can be used in attempts to minimize machine noise.

References

[1] J. S. BENDAT, A.G. PIERSOL, Measurement and Analysis of Random Data, John Wiley & Sons Inc., New York, London, Sydney 1966, ch. 5.
[2] J. BENES, Statistical Dynamics of Automatic Control Systems, ILIFFE Books Ltd., London 1967, p. 161-165.
[3] J. T. BROCH, On the application and limitations of the cross-correlation and the cross-spectral density techniques, Briiel & Kjaor Technical Review, 4, 3-27 (1970).
[4] A. K. NOVIKOV, Correlation measurements in ship acoustics, (in Russian), Energia, Leningrad 1971.
[5] J. T. BROCH, Mechanical Vibration and Shock Measurements, Briel & Kjaer, 246-255 (1973).
[6] J. T. BROCH, On the measurement and interpretation of cross-power spectra, Briiel & Kjaer Technical Review, 3, 3-20 (1968).
[7] K. J. GOFF, The application of correlation techniques in some acoustic measurements, JASA, 27, 2, 223-236 (1955).