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arXiv 2106.02255physics.app-ph
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耦合共振超材料的宽带强声传输损耗

Broadband and intense sound transmission loss by a coupled-resonance acoustic metamaterial

David Roca, Mahmoud I. Hussein

摘要:

声学超材料的出现开辟了控制声音传输的新领域。然而,一个关键的限制是,基于单位单元中的单个局部谐振器的声学超材料产生受限的窄带衰减峰值;并且当使用多个局部谐振器时,出现的衰减峰值-虽然很多-每个仍然很窄并且由通带分开。在这里,我们提出了一种新的声学超材料的概念,通过两个反共振产生声音传输损耗-在一个带隙中-完全耦合,因此提供了一个宽带衰减范围;这是除了提供一个隔离强度,超过90分贝的两个峰值。下面的耦合谐振机制以具有内部连续孔$-$的单面板、单材料柱撑板结构的形式实现,这是一种实用的配置,其适合于对感兴趣的频率范围(低至亚千赫兹)进行设计调整和优化,并且适合于大规模制造。

英文摘要:

The advent of acoustic metamaterials opened up a new frontier in the control of sound transmission. A key limitation, however, is that an acoustic metamaterial based on a single local resonator in the unit cell produces a restricted narrow-band attenuation peak; and when multiple local resonators are used the emerging attenuation peaks -- while numerous -- are each still narrow and separated by pass bands. Here, we present a new acoustic metamaterial concept that yields a sound transmission loss through two antiresonances -- in a single band gap -- that are fully coupled and hence provide a broadband attenuation range; this is in addition to delivering an isolation intensity that exceeds 90 decibels for both peaks. The underlying coupled resonance mechanism is realized in the form of a single-panel, single-material pillared plate structure with internal contiguous holes$-$a practical configuration that lends itself to design adjustments and optimization for a frequency range of interest, down to sub-kilohertz, and to mass fabrication.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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