40th International Conference on Production Engineering of Serbia
ICPES 2025
Nis, Serbia, 18-19th september 2025
ACCURACY OF SOUND POWER DETERMINATION USING DIFFERENT SOUND INTENSITY METHODS: A CASE STUDY ON A VACUUM PUMP
Tanja Dulovic, Branko Radicevic, Jovana Peric, Mladen Rasinac, Vladan Grkovic
DOI: 10.46793/ICPES25.475D
This study presents the measurement and analysis of the sound power emitted by a vacuum pump using two sound intensity-based methods in accordance with ISO 9614: the discrete point method and the scanning method. The sound intensity measurements were conducted under two airflow conditions (5 l/min, 15 l/min) in the frequency range from 200 to 6000 Hz range. The results indicate a high level of agreement between the two methods in terms of the frequency distribution of sound power, with the discrete point method yielding slightly higher values due to more detailed spatial sampling. The maximum observed difference between the methods was 2.4 dB, recorded at 250 Hz and 400 Hz. The highest sound power levels occurred between 1000 and 2000 Hz, which corresponds to the typical spectral range of mechanical noise. The result showed that noise emission's loudest source is the rear face of the pump, likely due to the position of the electric motor cooling fan. These findings validate both techniques for use in describing noise emissions from similar equipment
Sound power, sound intensity, vacuum pump
[1] M. Aliabadi, R. Golmohammadi, A. Ohad: Empirical Comparison of the In Situ Methods for Determining Sound Power of Typical Embroidery Machine Located in Industrial Workroom, International Journal of Occupational Hygiene, Vol. 5, No. 3, pp. 89-95, 2013.
[2] W. Mickiewicz, M. Raczynski, A. Parus: Performance Analysis of Cost-Effective Miniature Microphone Sound Intensity 2D Probe, Physical Sensors , Vol. 20, No. 1, p. 271, 2020.
[3] N. Kneževic, M. Bjelic, K. Jovanovic: Performance Analysis of Cost-Effective Miniature Microphone Sound Intensity 2D Probe, International Journal of Electrical Engineering and Computing, Vol. 2, No. 1, pp. 20-28, 2019.
[4] R. Girgis, K. Garner, M. Bernesjö, J. Anger, D. Chu: Measuring no - load and load noise of power transformers using the Sound Pressure and Sound Intensity methods — Part - I: Outdoors measurements, in: 2008 IEEE Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century, 2008, Pittsburgh, PA, USA, pp. 1-8.
[5] S. Nagata, F. Kenji, T. Wada, D. Asano, T. Yanagisawa: A three-dimensional sound intensity measurement system for sound source identification and sound power determination by ln models, The Journal of the Acoustical Society of America, Vol. 118, No. 6, pp. 3691-3705, 2005.
[6] K. Zhao, Y. Lou, G. Peng, C. Liu, H. Chang: A Review of the Development and Research Status of Symmetrical Diaphragm Pumps, Symmetry in Micro/Nanofluid and Fluid Flow, Vol. 15, No. 1, p. 2091, 2023.
[7] Y. Liang, Z. Chen, J. Liao: Numerical simulation and experimental evaluation of flow ripple characteristics of Truninger pump, Scientific Reports, Vol. 12, No. 1, 2022.
[8] Q. Si, C. Shen, X. He, H. Li, K. Huang, J. Yuan, Numerical and experimental study on the flow-induced noise characteristics of high-speed centrifugal pumps, Applied Sciences, Vol. 10, No. 9, p.3105, 2020.
[9] M. Ibrahim, M. Mahat, CFD Analysis of Electromagnetic Based Valveless Pump, Procedia Engineering, Vol. 41, pp. 1524-1532, 2012.
[10] ISO 9614-1, Acoustics — Determination of sound power levels of noise sources using sound intensity — Part 1: Measurement at discrete points, 1993
[11] ISO 9614-2, Acoustics — Determination of sound power levels of noise sources using sound intensity, Part 2: Measurement by scanning, 1996
[12] M. Bjelic, N. Knezevic, K. Jovanovic: Automatizovano merenje intenziteta zvuka pomocu robota i intenzitetske sonde, in: Proceedings of the 17th International Symposium INFOTEH, 21-23 March 2018, Jahorina, BiH, pp. 17-22.
[13] C. M. de Souza, L. C. S. Góes: SOUND POWER DETERMINATION USING ACOUSTIC INTENSIMETRY,APPLYING DISCRETE POINTS AND SCANNING METHODS, in: Proceedings of COBEM 2007, 5-9 November 2007, Brasília, DF
[14] V. Wittstock, S. Brezas, F. Heisterkamp: Sound power determination by intensity—are field indicators and criteria in iso 9614 meaningful?, The Journal of the Acoustical Society of America, Vol. 155, No. 1, pp. 588-599, 2024.