Acoustic Metamaterials for the Control of Railway Noise

用于控制铁路噪声的声学超材料

• 批准号: 105754
• 金额: $ 13.71万
• 依托单位: SONOBEX LIMITED
• 依托单位国家: 英国
• 项目类别: Study
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=105754
• 关键词: Acoustic; Metamaterials; Control; Railway; Noise

Despite the significant increase in noise over the past 60yrs, advancements in noise barrier technology have been minimal, with 75% of all noise barriers installed in the UK still in the form of timber fences with a typical performance of ~6dB and short lifespan due to degradation.The WHO recommendations include very low noise levels identified in the Night Noise Guidelines, these are 55 dB as an interim target and 40dB as an ultimate objective by 2020\. To put this in perspective the average noise levels for high-speed rail is on average \>90dB(A), indicating the currently available solutions are not adequate to meet the growing need for robust noise control solutions and to meet the 2020 target.Noise barriers are a significant asset for Highways and Railway Organisation's (HRO's) and procurement, installation and maintenance represent a significant long-term financial investment. The research need is for HRO's to have a better performing product in terms of in-situ barrier test performance and to be better informed in relation to the planning, procurement and management of barriers along their networks, which the outcomes of this Project will seek to answer.The Project will deliver a "works like, looks like" pre-production prototype of an "acoustic metamaterial" based noise barrier technology specifically designed to mitigate Railway noise, with focus on High Speed Rail.This is a highly disruptive product offering a step change in noise mitigation solutions, into a well established global marketplace, in need of innovation.

尽管在过去的60年里，噪音显著增加，但隔音屏障技术的进步微乎其微，在英国安装的所有隔音屏障中，75%仍然是木栅栏的形式，其典型性能为~6dB，并且由于降解而寿命较短。世卫组织的建议包括夜间噪音指南中确定的非常低的噪音水平，这些是55 dB作为中期目标，40 dB作为到2020年的最终目标。从这个角度来看，高速铁路的平均噪声水平平均为90 dB（A），这表明目前可用的解决方案不足以满足对稳健噪声控制解决方案日益增长的需求，也不足以满足2020年的目标。隔音屏障是公路和铁路组织（HRO）和采购的重要资产，安装和维护是一项重大的长期财务投资。研究需要HRO在现场屏障测试性能方面拥有性能更好的产品，并更好地了解其网络沿着屏障的规划、采购和管理，本项目的成果将寻求回答这些问题。本项目将提供一个“工程，看起来像是“基于“声学超材料”的隔音屏障技术的预生产原型，该技术专门用于减轻铁路噪音，专注于高速铁路。这是一款极具颠覆性的产品，为噪音缓解解决方案提供了一步变化，进入了一个完善的全球市场，需要创新。