Louvred Noise Barrier for Traffic Noise Reduction

IF 0.6 4区 工程技术 Q4 ENGINEERING, CIVIL Baltic Journal of Road and Bridge Engineering Pub Date : 2021-03-29 DOI:10.7250/BJRBE.2021-16.519
T. Astrauskas, P. Baltrėnas, T. Januševičius, R. Grubliauskas
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引用次数: 5

Abstract

Environmental issues near roads become more and more important in our society daily life. One of the most critical environmental issues is traffic noise. The present paper study louvred noise barrier designed by authors. The louvred noise barrier provides sound attenuation while allowing airflow and sunlight through it. Since the airflow resistance of the barrier is low, it requires a shallow foundation compared to conventional noise barriers. The sound attenuation performance of the louvred noise barrier was tested experimentally in a sound transmission chamber. Airflow resistance simulated using a computational fluid dynamics model. The simulation and experimental study were done with different louvred noise barrier setup: change of louvre blade angle and sound-absorbing material thickness. The results showed potential for future development for the field testing. Sound attenuation was highest in 2500 Hz and 3150 Hz octave frequency bands. Depending on the louvred barrier setup, sound attenuation was up to 28 dB(A) in mentioned frequency bands. The equivalent sound pressure level reduced up to 17 dB(A). The results showed that an increase in the louvre blade angle increases sound attenuation and increases airflow resistance.
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百叶窗隔音屏障减低交通噪音
道路附近的环境问题在我们的社会日常生活中变得越来越重要。交通噪音是最严重的环境问题之一。本文对作者设计的百叶隔音屏障进行了研究。百叶隔音屏障提供了声音衰减,同时允许气流和阳光通过它。由于屏障的气流阻力较低,与传统的隔音屏障相比,它需要较浅的基础。在传声室中对百叶隔音屏障的消声性能进行了实验测试。采用计算流体力学模型模拟气流阻力。对不同百叶栅布置方式、改变百叶栅叶片角度和吸声材料厚度进行了仿真和实验研究。结果表明,该方法在未来的现场测试中具有发展潜力。在2500hz和3150hz的频带,声音衰减最大。根据百叶屏障的设置,上述频段的声音衰减高达28 dB(A)。等效声压级降低至17db (A)。结果表明:增大罗浮叶角会增大声衰减,增大气流阻力;
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Baltic Journal of Road and Bridge Engineering
Baltic Journal of Road and Bridge Engineering 工程技术-工程:土木
CiteScore
2.10
自引率
9.10%
发文量
25
审稿时长
>12 weeks
期刊介绍: THE JOURNAL IS DESIGNED FOR PUBLISHING PAPERS CONCERNING THE FOLLOWING AREAS OF RESEARCH: road and bridge research and design, road construction materials and technologies, bridge construction materials and technologies, road and bridge repair, road and bridge maintenance, traffic safety, road and bridge information technologies, environmental issues, road climatology, low-volume roads, normative documentation, quality management and assurance, road infrastructure and its assessment, asset management, road and bridge construction financing, specialist pre-service and in-service training;
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