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J Korean Soc Environ Eng > Volume 37(2); 2015 > Article
J Korean Soc Environ Eng 2015;37(2): 120-125. doi: https://doi.org/10.4491/KSEE.2015.37.2.120
도로소음원에 대한 방음패널 형상별 반사소음 저감효과
김일호1, 박태호2, 장서일3, 이혜인1
1한국건설기술연구원 환경・플랜트연구소
2서울시립대학교 에너지환경시스템공학과
3서울시립대학교 환경공학과
A Reduction Effect in Noise Reflection by Different Shapes of Soundproofing-panel
Ilho Kim1, Taeho Park2, Seoil Chang3, Haein Lee1
1Environmental and Plant Engineering Institute, Korea Institute of Civil Engineering and Building Technology
2Department of Energy and Environmental System Engineering, University of Seoul
3Department of Environmental Engineering, University of Seoul
Corresponding author  Ilho Kim ,Tel: 031-910-0649, Fax: 031-910-0291, Email: ihkim@kict.re.kr
Received: March 14, 2014;  Revised: November 20, 2014;  Accepted: February 26, 2015.  Published online: February 28, 2015.
ABSTRACT
With rapid urbanization, the volume of traffic in urban area has been significantly increased. This in turn led to problem which can be described as Road Traffic Noise. Currently, to alleviate the road traffic noise damage, a demand for installation of soundproofing walls is rising. Among different shapes of soundproof walls being installed, the reflection-type acoustical insulation panel is highly drawing attentions of residents due to the fact that it does not obstruct their field of vision in contrast with the opaque acoustical insulation panel. On the other hand, improving the soundproofing wall of the reflection-type acoustical insulation barrier panel needs to be focused on since it has a possibility to cause a secondary damage by reflected sounds. Therefore, in this research, study has been carried out to improve the forms in order to minimize travelling of reflected sounds through changing the frontal surface shape and geometrical shape of the reflection-type soundproofing panel. A result from comparison between the normal reflection-type soundproofing panel and the improved soundproofing panel, with reduction effects in the noise reflection, showed that the curved type of soundproofing panel has an impact on reducing the noise up to 1.5 dB. Furthermore, from the research conducted, it appears that the increase and decrease in the reflected sounds can be changeable depending on various design factors. Thus, it turns out that the study shows a potential possibility to develop a reduction technology of the reflected sounds pertaining to overall condition on the soundproofing walls.
Key Words: Noise Barrier, Sound Insulation Properties, Panel Shape, Reflection Noise, Curved Noise Barrier
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