scholarly journals Investigation of the variation of noise spectrum behind noise barriers made of different materials

2014 ◽  
Author(s):  
Donatas Butkus ◽  
Tomas Januševičius
Keyword(s):  
Noise Spectrum ◽  
Noise Barriers

scholarly journals Performance of Traffic Noise Barriers with Varying Cross-Section

2011 ◽  
Vol 23 (3) ◽  
pp. 161-168 ◽  
Author(s):  
Sanja Grubeša ◽  
Hrvoje Domitrović ◽  
Kristijan Jambrošić
Keyword(s):  
Cross Section ◽  
Insertion Loss ◽  
Traffic Noise ◽  
Noise Spectrum ◽  
Optimum Shape ◽  
Noise Barriers ◽  
Performance Change ◽  
Barrier Performance ◽  
Loss Parameter ◽  
Human Hearing

The efficiency of noise barriers largely depends on their geometry. In this paper, the performance of noise barriers was simulated using the numerical Boundary Element Method (BEM). Traffic noise was particularly considered with its standardized noise spectrum adapted to human hearing. The cross-section of the barriers was varied with the goal of finding the optimum shape in comparison to classical rectangular barriers. The barrier performance was calculated at different receiver points for a fixed barrier height and source position. The magnitude of the insertion loss parameter was used to evaluate the performance change, both in one-third octave bands and as the broadband mean insertion loss value. The proposed barriers of varying cross-section were also compared with a typical T-shape barrier of the same height.

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