Practical Sound Attenuation using Broad Band Sound Attenuating Devices

减少声音污染带来的烦扰目前是公众关注和立法行动的主题。我们设计了一种新颖的宽带声音衰减装置，可以配置为在各种情况下工作。我们的小规模实验室原型比传统屏障性能更好，其性能与我们的有限元模型预测一致。我们技术的一个非常重要和有益的特性是它的可扩展性。它可以被定制为在整个声学(甚至是超声波)范围内衰减声音。这意味着它可以很容易地进行调整，以适应广泛的应用。我们已经确定了两个关键市场，在不久的将来，立法需要加强对噪音污染的保护，即：i)铁路/道路的环境噪音和ii)噪音机器的保护我们的首要目标是将我们现有的模型扩展到涉及更大衰减器的全面模拟和噪音污染的真实模拟。在优化了我们确定的两个关键市场所需的保护系统后，我们打算建造和测试一个全尺寸的可拆卸原型，以便向潜在的工业合作伙伴进行演示。这将是一个为防止机械噪音而设计的系统，因为尺寸和便携性将是必需的。如果时间允许，我们打算建造一个短节的模块化结构屏障，用于道路声衰减。在实验室条件下，我们的系统提供了良好的衰减水平，超过了质量定律的比较。初步研究表明，声音衰减机制实际上是与材料无关的，并且在屏蔽低频声音方面具有进一步的优势，而不需要像目前的技术那样增加屏障的质量(在当前的系统中，屏蔽低频需要巨大的屏障)。成功的结果将导致消声系统在整个行业中得到广泛应用，与传统系统相比具有重大优势。

Reduction of annoyance from sound pollution is currently a subject of public concern and legislative action. We have a novel design of Broad Band Sound Attenuating Device, which can be configured to operate in a wide variety of situations. Our small-scale laboratory prototype performs better than conventional barriers, and its performance agrees with our Finite Element model predictions. A very important and beneficial property of our technology is its scalability. It can be tailored to attenuate sounds over the whole acoustic (and indeed ultrasonic) range. This means that it can readily be adapted to suit a wide range of applications. We have identified 2 key markets where legislation requires improved protection from sound pollution in the near future, namely:i) environmental noise from rail/roads and ii) protection from noisy machineryOur first aim is to extend our current models to full-scale simulations involving larger attenuators and realistic simulations of noise pollution. Having optimized the protection systems required for our two identified key markets we intend to build and test a full-scale demountable prototype for demonstration to potential industrial partners. This will be a system designed for protection from machinery noise since size and portability will be required. If time allows it is intended to construct a short section, modular construction barrier for use in road sound attenuation.In laboratory conditions our system offers good attenuation levels beating a mass law comparison. Initial research shows that the sound attenuation mechanism is virtually material independent, and poses a further advantage of blocking out low frequency sound without the need of increasing the mass of the barrier as with current technology (in current systems blocking low frequencies requires massive barriers). A successful outcome will lead to sound attenuation systems with wide applications throughout industry which offer major advantages over conventional systems.