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基于微穿孔圆柱的声子晶体屏障的隔音与反射特性

Sound Insulation and Reflection Properties of Sonic Crystal Barrier Based on Micro-Perforated Cylinders.

作者信息

Dimitrijević Stefan M, García-Chocano Víctor M, Cervera Francisco, Roth Emelie, Sánchez-Dehesa José

机构信息

Structor Akustik AB, Solnavägen 4, 113 65 Stockholm, Sweden.

School of Electrical Engineering, University of Belgrade, Bulevar K. Aleksandra 73, 11000 Belgrade, Serbia.

出版信息

Materials (Basel). 2019 Aug 31;12(17):2806. doi: 10.3390/ma12172806.

DOI:10.3390/ma12172806
PMID:31480417
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6747850/
Abstract

A sonic crystal barrier, consisting of empty micro-perforated cylindrical shells, was built on the campus at the Universitat Politècnica de València in 2011 and characterised by using a non-standardised measurement technique. In this paper, the sonic crystal barrier, upgraded with rubber crumb inside the micro-perforated cylindrical shells, was characterised by using standardised measurement techniques according to EN 1793-5 and EN 1793-6. As a result of the characterisation, sound insulation properties of the barrier were shown to be a combination of the absorptive properties of the individual building units and the reflective properties of their periodic distribution. In addition, its performance was compared with a similar barrier consisting of rigid polyvinyl chloride (PVC) cylinders, which was recently characterised using the same standardised techniques. In comparison with the barrier based on PVC cylinders, the barrier investigated here produced a broadband enhancement of the sound insulation and lower reflection indices in the targeted frequency range. It was also shown that the influence of leakage under the barrier and the width of the temporal window on sound insulation was negligible. While EN 1793-5 and 1793-6 allow a direct comparison of the performance of different noise barriers, the applicability to this new type of barriers requires further investigation.

摘要

2011年，一个由空心微穿孔圆柱壳组成的声晶体屏障在瓦伦西亚理工大学的校园内建成，并采用非标准化测量技术对其进行了特性表征。本文中，对微穿孔圆柱壳内填充橡胶颗粒的升级声晶体屏障，采用了符合EN 1793-5和EN 1793-6的标准化测量技术进行特性表征。通过表征发现，该屏障的隔音性能是各个建筑单元的吸声性能与其周期性分布的反射性能的综合体现。此外，还将其性能与一个由硬质聚氯乙烯（PVC）圆柱组成的类似屏障进行了比较，该类似屏障最近也采用相同的标准化技术进行了特性表征。与基于PVC圆柱的屏障相比，本文研究的屏障在目标频率范围内实现了隔音的宽带增强以及更低的反射指数。研究还表明，屏障下方的泄漏以及时间窗口宽度对隔音的影响可忽略不计。虽然EN 1793-5和1793-6允许直接比较不同隔音屏障的性能，但这种新型屏障的适用性仍需进一步研究。

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本文引用的文献

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Sustainable sonic crystal made of resonating bamboo rods.可持续的声子晶体，由共振竹棒制成。
J Acoust Soc Am. 2013 Jan;133(1):247-54. doi: 10.1121/1.4769783.
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Noise control by sonic crystal barriers made of recycled materials.用回收材料制成的声子晶体屏障进行噪声控制。
J Acoust Soc Am. 2011 Mar;129(3):1173-83. doi: 10.1121/1.3531815.
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European methodology for testing the airborne sound insulation characteristics of noise barriers in situ: experimental verification and comparison with laboratory data.欧洲现场测试隔音屏障空气声隔音特性的方法：实验验证及与实验室数据的比较
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