The problem of noise control and attenuation is of interest in a broad range of applications, especially in the low-frequency range, below 1000 Hz. Acoustic metamaterials allow us to tackle this problem with solutions that do not necessarily rely on high amounts of mass, however most of them still present two major challenges: they rely on complex structures making them difficult to manufacture, and their attenuating capabilities are limited to narrow frequency bandwidths. Here we propose the Multiresonant Layered Acoustic Metamaterial (MLAM) concept as a novel kind of acoustic metamaterial based on coupled resonances mechanisms. Their main advantages hinge on providing enhanced sound attenuation capabilities in terms of a double-peak sound transmission loss response by means of a layered configuration suitable for large scale manufacturing.

噪声控制和衰减问题在广泛的应用中受到关注，尤其是在低于 1000 Hz 的低频范围内。声学超材料使我们能够通过不一定依赖于大量质量的解决方案来解决这个问题，但是它们中的大多数仍然存在两个主要挑战：它们依赖于复杂的结构使其难以制造，并且它们的衰减能力仅限于窄频率带宽。在这里，我们提出了多谐振分层声学超材料 (MLAM) 概念，作为一种基于耦合谐振机制的新型声学超材料。它们的主要优势在于通过适用于大规模制造的分层配置在双峰值声音传输损失响应方面提供增强的声音衰减能力。