Improvement of sound insulation performance of roadside building facade

路边建筑立面隔音性能的提高

基本信息

批准号：
11450215
负责人：
TACHIBANA Hideki
金额：
$ 8.83万
依托单位：
University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11450215/
关键词：
Roadside building Sound insulation Road traffic noise Scale model experiment Numerical analysis Field measurement Measuring technique 二重皮膜構造

项目摘要

The convenience of city life is greatly dependent on the road transportation. On the other hand, development of roads and progress of the motorization bring a negative property, that is, they make sound environment of the accommodation area worse and worse. In order to solve the problem, defending performance of the roadside buildings against external noises must be improved in addition to countermeasures for the noise source of automobile, development of the low-noise pavement (drainage asphalt pavement) and improvement on the road structures. In this study, the following experimental investigations were performed for purposes of systematically investigating the techniques by which roadside sound environment is improved and proposing ideal roadside buildings in the future from a viewpoint of acoustical engineering.1. Effect of Absorption Treatment of Balcony Space against Road/Railway Traffic NoiseAs the method of reducing the traffic noise, contrivance of the facade shape and acousti … More c treatment of each facade part can be applicable. However, systematic examinations for these countermeasures have not been carried out. In this study, the effect was examined by numerical calculation, scale model experiment and field measurement. As a result of numerical analysis and model experiment, the following knowledge was obtained : Over 5 dB sound reduction effect is possible against road traffic noise when the balcony eaves ceiling is treated by absorbing materials. The effect is higher as a high floor. In addition, the effect of balcony eaves ceiling sound absorption was examined and confirmed by field measurement at a multiple dwelling house which is located along a railway line.2. Experimental Study on Improvement of Sound Insulation Performance of Double WindowA double window, which is often used for raising the sound insulation performance, has disadvantage in low frequencies caused by the resonance transmission. whereas it has much higher performance in high frequencies than a single window. In order to improve the sound insulation defect of a double window in low frequencies, an idea of applying resonance type sound absorbing structure (Helmholtz resonator), which is effective in the sound absorption at low frequencies, may be effective. The applicability was investigated by an experimental examination. As a result of 1/5 scale model experiment, the transmission loss in frequency range which coincides the resonance transmission of the double window is 7 dB improved and the applicability of resonance type sound absorption structure against the resonance transmission of a double window is found.3. Measuring Method of Sound Insulation Performance of Building FacadeIn actual roadside building, low Signal/Noise ratio caused by background road traffic noise makes the sound insulation performance measurement of the building facade much difficult. Measuring methods by which the high-precise measuring result can be obtained under low S/N ratio environment are indispensable in order to examine the effect of the countermeasure proposed by this study in actual buildings. For a purpose of establish the method applicable to field sound transmission measurement, comparison examinations among the synchronized integration technique, time stretched pulse method and M-sequence modulated correlation technique were carried out by laboratory experiment and field measurement. Less

城市生活的便利在很大程度上取决于道路运输。另一方面，道路的发展和汽车的进步带来了负面的财产，也就是说，它们使住宿区域的合理环境越来越糟。为了解决该问题，除了对抗噪声来源，低噪声路面（排水沥青路面）的噪声来源外，还必须改善路边建筑物对外部噪声的捍卫性能，并在这项研究中，以下实验研究是为了通过系统地进行了进一步研究，并通过系统地进行了进一步研究，并在路边进行了进一步的研究，以实现路线的审视，以进行进一步研究，以实现进一步的构建。工程1。吸收阳台空间对道路/铁路交通噪声的影响，减少交通噪音，立面形状和声学的方法……可以适用每个立面部分的更多C处理。但是，尚未对这些对策进行系统的检查。在这项研究中，通过数值计算，比例模型实验和现场测量来检查效果。由于数值分析和模型实验，获得了以下知识：当阳台逃脱天花板的天花板通过吸收材料处理时，可能会对道路交通噪声进行超过5 dB的声音降低效果。效果较高，因为高地板。此外，在沿铁路线的多个住宅中，检查并通过现场测量来检查并确认阳台逃脱的天花板吸收的效果。2。关于改善双Windowa双窗的声音绝缘性能的实验研究（通常用于提高隔热性能），这是由谐振传输引起的低频灾难。而高频的性能比单个窗口高得多。为了改善低频的双窗口的声音绝缘缺陷，施加共振类型吸收结构（Helmholtz共振器）的想法有效，该结构可在低频下有效地吸收声音。通过实验检查研究了该应用。由于1/5比例模型实验，频率范围的传输损失恰好相恰逢双窗口的共振传输提高了7 dB，并且与双窗口的共振传输相吻合，共振类型吸收结构的适用性。衡量建筑物立方体实际路边建筑物的隔音性能，由背景路交通噪声引起的低信号/噪声比，使建筑物外墙的隔音性能测量变得非常困难。为了检查本研究在实际建筑物中提出的对策的效果，必须在低S/N比环境下获得高精度测量结果的测量方法。为了建立适用于现场声音传输测量的方法，通过实验室实验和现场测量进行了同步集成技术，时间拉伸脉冲方法和M序列调制相关技术之间的比较检查。较少的