Laser method of acoustical emission control from vibrating surfaces

Zbigniew Motyka

doi:10.1117/12.2011138

22 January 2013 Laser method of acoustical emission control from vibrating surfaces

Zbigniew Motyka

Proceedings Volume 8703, Laser Technology 2012: Applications of Lasers; 87030A (2013) https://doi.org/10.1117/12.2011138
Event: Tenth Symposium on Laser Technology, 2012, Szczecin, Poland

Abstract

For limitation of the noise in environment, the necessity occurs of determining and location of sources of sounds emitted from surfaces of many machines and devices, assuring in effect the possibility of suitable constructional changes implementation, targeted at decreasing of their nuisance. In the paper, the results of tests and calculations are presented for plane surface sources emitting acoustic waves. The tests were realized with the use of scanning laser vibrometer which enabled remote registration and the spectral analysis of the surfaces vibrations. The known hybrid digital method developed for determination of sound wave emission from such surfaces divided into small finite elements was slightly modified by distinguishing the phase correlations between such vibrating elements. The final method being developed may find use in wide range of applications for different forms of vibrations of plane surfaces.

Citation Download Citation

Zbigniew Motyka "Laser method of acoustical emission control from vibrating surfaces", Proc. SPIE 8703, Laser Technology 2012: Applications of Lasers, 87030A (22 January 2013); https://doi.org/10.1117/12.2011138

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