An analyses of the noise reduction effect of vegetation noise barrier using scaled model experiments

모형실험을 통한 식생형 방음벽의 소음저감 효과 분석

Haan, Chan-Hoon;Hong, Seong-Shin

  • Received : 2015.10.08
  • Accepted : 2016.04.11
  • Published : 2016.05.31


Design of a vegetation type sound barrier was presented as a noise barrier on the boundary of neighborhood facilities including schools, and apartments. The suggested noise barrier is made of unit blocks that are to be formed by stacking over the wall structure containing the plant and soils in the blocks. The advantage of the vegetation noise barrier is to acquire not only sound absorptive effects of plants and soils, but also sound diffusive effect caused by the irregular surface of the barrier which could eventually mitigate the noise. First, the optimum size of the units to obtain the highest noise reduction was investigated using 1/10 scaled model experiment, and sound attenuation experiments were carried out using a 1/2 mock-up model which is 2 m high and 5 m long. Total 1,137 unit blocks were made of synthetic woods with the size of $10{\times}10{\times}9cm$. These unit blocks were installed on the both side of the 1/2 mock-up steel framed noise barrier. As a result, it was revealed that the block typed vegetation noise barrier has 7 dB higher insertion loss in comparison with the general plane noise barrier. Also, it was found that the appropriate size of unit blocks is $20{\times}20cm$ which has large effect of sound insertion loss.


Vegetation noise barrier;Traffic noise;Wall greening;Insertion loss;Scale model experiment;Mock-up experiment


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Supported by : 충북대학교