Improvement of the efficiency of noise protective screens due to sound absorption

Authors

DOI:

https://doi.org/10.15587/2706-5448.2020.206018

Keywords:

noise protective shield, sound diffraction, sound level reduction, impedance properties, sound-absorbing screen

Abstract

The object of research is the sound field from linear sound sources around noise screens. The decrease in sound levels with the screen is primarily due to the geometric dimensions of the screen and the relative position of the screen and the sound source. The influence of these factors has been given a large number of scientific publications. However, the problematic point of such studies is that screens were considered either completely acoustically rigid or sound-absorbing.

In this paper, the situation of the impedance screen is considered, quite often applied in practice. The calculation of the field around such a screen is carried out by computer simulation, which makes it easy to change the value of the acoustic impedance of the screen surface.

To calculate the sound field around the screen, the finite element method is chosen. Sound-absorbing properties of the screen were determined by changing the acoustic impedance of the front side of the screen. At the same time, the screen remained acoustically opaque. Thus, an analysis is made of the influence of the sound absorption coefficient on the sound field around the screen from different heights of the screen and the distance of sound sources to the screen. This makes it possible to obtain results of sound pressure levels around screens encountered in engineering activities. Studies have shown that the use of sound-absorbing cladding for noise screens can increase their effectiveness. It is revealed that the closer the screen is located to the sound source, the greater the influence of its sound-absorbing properties. It is shown that for low frequencies the increase in screen efficiency due to sound absorption can reach 5 dB.

The obtained results during the study can be used in the design of noise protective shields to reduce noise levels from traffic flows. The results obtained will be especially useful when designing screens with heights of more than 4 m

Author Biographies

Vitalii Didkovskyi, National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute», 37, Peremohy ave., Kyiv, Ukraine, 03056

Doctor of Technical Sciences, Professor

Department of Acoustic and Multimedia Electronic Systems

Vitaly Zaets, National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute», 37, Peremohy ave., Kyiv, Ukraine, 03056

PhD, Аssociate Professor

Department of Acoustic and Multimedia Electronic Systems

Svetlana Kotenko, State Enterprise «State Research Institute of Building Constructions», 5/2, Preobrazhenska str., Kyiv, Ukraine, 03037

PhD, Junior Researcher

Department of Building Physics and Energy Efficiency

References

  1. Zaets, V., Kotenko, S. (2017). Investigation of the efficiency of a noise protection screen with an opening at its base. Eastern-European Journal of Enterprise Technologies, 5 (5 (89)), 4–11. doi: http://doi.org/10.15587/1729-4061.2017.112350
  2. Gieva, E., Ruskova, I., Nedelchev, K., Kralov, I. (2018). An investigation of the influence of the geometrical parameters of a passive traffic noise barrier upon the noise reduction response. AIP Conference Proceedings. AIP Publishing LLC, 2048 (1), 020020. doi: http://doi.org/10.1063/1.5082038
  3. Farina, A., Fausti, P. (1995). Motorway traffic noise reduction by means of barriers: a design example based on prediction models and experimental verification. Available at: http://www.angelofarina.it/Public/Papers/074-ICA95.PDF
  4. Manojkumar, N., Basha, K., Srimuruganandam, B. (2019). Assessment, Prediction and Mapping of Noise Levels in Vellore City, India. Noise Mapping, 6 (1), 38–51. doi: http://doi.org/10.1515/noise-2019-0004
  5. Directive, C. (1988). 89/106/EEC" Council Directive 89/106. EEC of 21 December 1988 on the approximation of laws, regulations and administrative provisions of the Member States relating to construction products. Available at: https://eur-lex.europa.eu/legal-content/en/ALL/?uri=CELEX:31989L0106
  6. Trokhymenko, M. P., Zaiets, V. P. (2010). Vplyv parametriv shumozakhysnykh ekraniv na yikh efektyvnist. Budivelni materialy, vyroby ta sanitarna tekhnika, 36, 71–76.
  7. Maekawa, Z. (1968). Noise reduction by screens. Applied Acoustics, 1 (3), 157–173. doi: http://doi.org/10.1016/0003-682x(68)90020-0
  8. Jonasson, H. G. (1972). Sound reduction by barriers on the ground. Journal of Sound and Vibration, 22 (1), 113–126. doi: http://doi.org/10.1016/0022-460x(72)90849-8
  9. Hewett, D. P., Langdon, S., Chandler-Wilde, S. N. (2014). A frequency-independent boundary element method for scattering by two-dimensional screens and apertures. IMA Journal of Numerical Analysis, 35 (4), 1698–1728. doi: http://doi.org/10.1093/imanum/dru043
  10. François, S., Schevenels, M., Degrande, G., Borgions, J., Thyssen, B. (2008). A 2.5 D finite element-boundary element model for vibration isolating screens. Proceedings of ISMA2008 International Conference on Noise and Vibration Engineering, 5, 2765–2776.
  11. Ganesh, M., Morgenstern, C. (2016). High-order FEM–BEM computer models for wave propagation in unbounded and heterogeneous media: Application to time-harmonic acoustic horn problem. Journal of Computational and Applied Mathematics, 307, 183–203. doi: http://doi.org/10.1016/j.cam.2016.02.024
  12. Kouroussis, G., Van Parys, L., Conti, C., Verlinden, O. (2014). Using three-dimensional finite element analysis in time domain to model railway-induced ground vibrations. Advances in Engineering Software, 70, 63–76. doi: http://doi.org/10.1016/j.advengsoft.2014.01.005
  13. Sun, W., Liu, L., Yuan, H., Su, Q. (2019). Influence of Top Shape on Noise Reduction Effect of High-Speed Railway Noise Barrier. IOP Conference Series: Materials Science and Engineering, 493, 012043. doi: http://doi.org/10.1088/1757-899x/493/1/012043
  14. Monazzam, M. R., Naderzadeh, M., Momen, S., Fard, B. (2012). An optimization process for a T-shaped noise barrier coated by primitive root diffuser equipped with perforated sheets. Journal of Food, Agriculture & Environment, 10 (1), 993–996.
  15. Hayek, S. I. (1990). Mathematical modeling of absorbent highway noise barriers. Applied Acoustics, 31 (1-3), 77–100. doi: http://doi.org/10.1016/0003-682x(90)90054-x
  16. Ding, L., Van Renterghem, T., Botteldooren, D. (2009). Estimating the effect of semi-transparent traffic noise barrier with ultra weak variational formulation. 8th European conference on Noise Control (Euronoise 2009): Action on noise in Europe, 1369–1375.
  17. Luo, W.-J., Liu, G.-Y. (2017). Study on the Noise Reduction of Sound Absorption Noise Barrier. Materials Science and Engineering. doi: http://doi.org/10.1142/9789813226517_0133
  18. ISO 9613-2 (1996). Attenuation of Sound During Propagation Outdoors–Part 2: A General Method of Calculation. Geneva: ISO. Available at: https://www.iso.org/standard/20649.html

Downloads

Published

2020-06-30

How to Cite

Didkovskyi, V., Zaets, V., & Kotenko, S. (2020). Improvement of the efficiency of noise protective screens due to sound absorption. Technology Audit and Production Reserves, 3(1(53), 11–15. https://doi.org/10.15587/2706-5448.2020.206018

Issue

Vol. 3 No. 1(53) (2020): Industrial and technology systems

Section

Mechanics: Original Research

License

Copyright (c) 2020 Vitalii Didkovskyi, Vitaly Zaets, Svetlana Kotenko

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

The consolidation and conditions for the transfer of copyright (identification of authorship) is carried out in the License Agreement. In particular, the authors reserve the right to the authorship of their manuscript and transfer the first publication of this work to the journal under the terms of the Creative Commons CC BY license. At the same time, they have the right to conclude on their own additional agreements concerning the non-exclusive distribution of the work in the form in which it was published by this journal, but provided that the link to the first publication of the article in this journal is preserved.