Influence of sound-absorping properties of noise protection barriers on road traffic participants

Authors

DOI:

https://doi.org/10.15587/2706-5448.2021.244597

Keywords:

noise barrier, sound pressure level, impedance properties, sound-absorbing barrier, sound reflection, parallel barriers

Abstract

The object of research is the sound field from linear sound sources between two parallel impedance noise barriers. The presence of barriers changes the structure of the sound field, as a result of which the sound pressure level in the area between the barriers increases. An increase in sound levels leads to both a decrease in the effectiveness of noise barriers and an increase in the negative impact on road users. One of the ways out of this situation is the construction of barriers with sound-absorbing properties. In this paper, the influence of the impedance properties of the barriers at the level of sound pressure in the area between the barriers is considered.

The finite element method was chosen to calculate the sound field around the barrier. A computer model of a linear sound source with vertical sound-absorbing barriers on both sides of the source was built in the Comsol Multiphysics software environment. The sound absorption properties of the barrier were determined by the acoustic impedance of the face of the barrier. The sound fields were calculated in octave bands with geometric mean frequencies from 31 to 500 Hz. In addition, the parameters that were also analyzed were the distance between the barriers and their height.

The solution of the problem made it possible to obtain a field of sound pressure levels around the barrier. Changeable simulation parameters made it possible to analyze a large number of situations of relative position of barriers and their heights encountered in engineering. Studies have shown that only at low frequencies and relatively small distances between barriers, the sound pressure level can increase significantly. However, it has also been shown that the use of sound-absorbing lining of noise barriers can reduce the sound pressure levels in the area between the barriers and improve the acoustic conditions for road users.

Author Biographies

Vitaly Zaets, National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute»

PhD

Department of Acoustic and Multimedia Electronic Systems

Dmytro Bida, National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute»

Postgraduate Student

Department of Acoustic and Multimedia Electronic Systems

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Published

2021-12-08

How to Cite

Zaets, V., & Bida, D. (2021). Influence of sound-absorping properties of noise protection barriers on road traffic participants. Technology Audit and Production Reserves, 6(1(62), 14–18. https://doi.org/10.15587/2706-5448.2021.244597

Issue

Vol. 6 No. 1(62) (2021): Industrial and technology systems

Section

Mechanics: Original Research

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Copyright (c) 2021 Vitaly Zaets, Dmytro Bida

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