Investigation of noise barriers enhancement efficiency for attenuation of low frequency traffic noise

Authors

  • D. Saliunas Kaunas University of Technology
  • V. Volkovas Kaunas University of Technology

DOI:

https://doi.org/10.5755/j01.mech.21.1.10137

Keywords:

low frequency traffic noise, noise barriers tops.

Abstract

This paper presents investigation of traffic noise barriers enhancement potentiality at low frequencies: re-garding measurements results near motorway with 43.3-49.8 percentage of heavy duty, the investigation assesses efficiency of existing (modelled and built according pre-dicted overall A-weighted rated sound levels) noise barriers and simulates (using finite element method) improving of them by adding most common T-shape and octagon-shape tops at low frequencies. According simulation results (model deals with divergence loss, diffraction from obstacles, absorption and reflection from surfaces of cylindrical sound waves), noise barrier enhancement with those tops has influence on additionally 0.6-6.5 dB reduction of SPL at low frequencies in a noise shadow zone.

DOI: http://dx.doi.org/10.5755/j01.mech.21.1.10137

Downloads

Published

2015-03-02

Issue

Vol. 21 No. 1 (2015)

Section

DYNAMICS OF MECHANICAL SYSTEMS

License

The copyright for the articles in this journal is retained by the author(s) with the first publication right granted to the journal. The journal is licensed under the Creative Commons Attribution License 4.0 (CC BY 4.0).