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Optimum control of broadband noise by arrays of cylindrical units made of a recycled material

机译：通过使用回收材料制成的圆柱单元阵列来最佳控制宽带噪声

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摘要

We report acoustic barriers that are designed to attenuate efficiently broadband noise. The barriers are structures consisting of only three layers of cylindrical units containing rubber crumb, a sound absorbing material obtained from recycling used tires. An optimization algorithm is developed to obtain the material distribution and dimensions of the building units giving the best attenuation properties for traffic noise, which is here chosen as an example in which the design procedure is applied. A good agreement is found between predictions and measurements for a 3 m height barrier that has been characterized in a transmission room.
机译：我们报告了旨在有效衰减宽带噪声的声屏障。屏障是仅由三层圆柱单元组成的结构，这些圆柱单元包含橡胶屑，该橡胶屑是通过回收旧轮胎而获得的吸声材料。开发了一种优化算法来获得建筑单元的材料分布和尺寸，从而为交通噪声提供最佳的衰减特性，此处将其作为应用设计程序的示例。对于3m高的障碍物，在传输室进行了表征，在预测和测量之间找到了很好的一致性。

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