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Determination of sound power level by using a microphone array and conventional methods

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Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Sound power is measured to make objective comparisons between the same type of products, but also because legislation requires it. To release a new product, it is often compulsory to certify it according to International Organization for Standardization (ISO) standards, and also with national and local regulations. Determining of sound power is not a straightforward process. Sound power can be determined through the measurement of sound pressure (series 3740 methods) or sound intensity (series 9614 methods). Selecting one of the above methods depends on the purpose of the test, as well as the available equipment, desired grade of accuracy, background noise level or the test environment. Nowadays the additional methods, such as microphone arrays are used to located of the noise source and determined of pressure sound level. But the results obtained with acoustic cameras cannot be, for now, used for legislative purposes (are not ISO compliant). In this work the differences in the determination of sound power level by using conventional ISO methods and microphone arrays are determined. The system composed of a loudspeaker and a fan were used as a sound source of the noise. Sound power levels according to ISO 3746 and ISO 9614-1 were determined and were compared with the developed method by using microphone arrays techniques.
Rocznik
Strony
1--8
Opis fizyczny
Bibliogr. 13 poz., il. kolor., fot., 1 wykr.
Twórcy
autor
  • Institute of Power Engineering - Thermal Technology Branch "ITC" in Lodz, 113 Dabrowskiego Street, 93-208 Lodz, Poland, patryk.gaj@itc.edu.pl
  • Institute of Power Engineering - Thermal Technology Branch "ITC" in Lodz, 113 Dabrowskiego Street, 93-208 Lodz, Poland, kamil.wojciak@itc.edu.pl
Bibliografia
  • 1. Directive 2006/42/EC of the European Parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast).
  • 2. R. F. Barron, Industrial noise control and acoustics, Marcel Dekker Inc, New York, 2001.
  • 3. A. D. Bies, C. H. Hansen, Engineering Noise Control. Theory and Practice, Fourth Edition, Spon Press of Taylor & Francis Group, New York, 2009.
  • 4. M. Aliabadi, R. Golmohammadi, A. Ohadi, Empirical comparison of the in situ methods for determining sound powet of typical embroidery machine located in industrial workroom, International Journal of Occupational Hygiene, 5(3) (2013) 89 - 95.
  • 5. C. Tomozei, A. Astofli, V. Nedeff, G. Lazar, Noise sources characterization inside and outside factory, Environmental Engineering and Management Journal, 3 (2012) 701 - 708.
  • 6. International Organization for Standardization, Engineering method in essentially free-field over a reflective plane (ISO 3744:2011); Precision method in anechoic or semi-anechoic room (ISO 3745:2012); Survey method with no special test environment (ISO 3746:2010); Engineering or survey method in situ in a reverberant environment (ISO 3747:2010).
  • 7. International Organization for Standardization, Acoustics -- Noise emitted by machinery and equipment -- Guidelines for the use of basic standards for the determination of emission sound pressure levels at a work station and at other specified positions (ISO 11200:2014).
  • 8. International Organization for Standardization, Precision, engineering or survey discrete measurement points metod (ISO 9614-1:2010); Engineering or survey scanning measurement metod (ISO 9614-2:1996); Precision scanning measurement method (ISO 9614-3:2002).
  • 9. W. Ji, L. Wang, Big data analytics based fault prediction for shop floor scheduling. J Manuf. Syst., 43 (2017) 187 - 94.
  • 10. D. Pleban, Method of acoustic assessment of machinery based on global acoustic quality index, Arch Acoust, 35 (2010) 223 - 235.
  • 11. E. Bilgic, H. Mutaf, C. Kirbas, E. Sadikoglu, Evaluation of uncertainty contributions of measurement surface and number of microphone positions in determination of sound power levels, Special issue of 3rd International Conference on Computational and Experimental Science and Engineering (ICCESEN 2016), Acta Physica Polonica, 132 (2017) 642 - 649.
  • 12. Don H. Johnson, Dan E. Dudgeon, Array Signal Processing: Concepts and Techniques, Prentice Hall Signal Processing Series, 1993.
  • 13. M. S. Brandstein, D. B. Ward (editors), Micro-phone Arrays: Signal Processing Techniques and Applications, Springer-Verlag, Berlin, Germany, 2001.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-f5f87329-4ac4-457f-bfe0-9af65f6be989
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