Improving sound insulation in low frequencies by multiple band-gaps in plate-type acoustic metamaterials

Zhou, Xiaoling; Wang, Longqi; Li, Qin; Peng, Fujun

doi:10.1016/j.jpcs.2020.109606

“…In order to produce wider frequency bandgaps, one needs to increase the internal resonating mass in the metamaterial, which makes them lose their lightweight capabilities that makes them competitive against other classical approaches. Several works found in the literature have tried to overcome this issue, for instance, by employing multiple resonators [26,29,30] or combining local resonance with other damping mechanisms [10,12,15,23]. However, the problem has not been entirely addressed.…”

Section: Motivationmentioning

confidence: 99%

Multiresonant Layered Acoustic Metamaterial (MLAM) solution for broadband low-frequency noise attenuation through double-peak sound transmission loss response

Roca

¹

,

Cante

²

,

Lloberas-Valls

³

et al. 2021

Extreme Mechanics Letters

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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.

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“…Based on this reason, Zhou et al. [393] presented a PAM having an appropriate performance in noise attenuation in the low-frequency domains. According to the results, the achieved multiple band-gaps led to some peaks in the acoustic transmission spectrum at this frequency domain.…”

Section: Acoustic Insulation Applicationsmentioning

confidence: 99%

Prediction of acoustic wave transmission features of the multilayered plate constructions: A review

Zarastvand

¹

,

Ghassabi

²

,

Talebitooti

³

2021

Jnl of Sandwich Structures & Materials

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This study collects all of the existent papers in the field of acoustic transmission across multilayered plate constructions. Herewith, a comprehensive source is proposed wherein approximately 410 references are reviewed and described from the first [Formula: see text] to [Formula: see text]. In the first part, in addition to the presentation of a complete explanation about the importance of the acoustic analysis of these structures, appropriate formulations are also provided. Furthermore, an overview of the thematic correspondent is carried out. Since the type of material used in these constructions can be very important in sound insulation, the significance of this subject is remarked. The papers are then classified based on their acoustic excitation fields containing plane wave, diffuse, random, and point source. After analyzing the research approaches according to different environmental properties, the articles are ordered based on their boundaries as finite and infinite. To present reliable outcomes, it is necessary to investigate a proper theory proportional to the structure’s thickness. Herewith, this issue is also discussed in detail. The review is also expanded to focus on the different vibroacoustic solutions. Before concluding remarks, the authors' research works are presented wherein either optimization algorithms or control techniques improve the acoustic performance of these structures.

show abstract

“…In order to produce wider frequency bandgaps, one needs to increase the internal resonating mass in the metamaterial, which makes them lose their lightweight capabilities that makes them competitive against other classical approaches. Several works found in the literature have tried to overcome this issue, for instance, by employing multiple resonators [26,29,30] or combining local resonance with other damping mechanisms [10,12,15,23]. However, the problem has not been entirely addressed.…”

Section: Motivationmentioning

confidence: 99%

Multiresonant Layered Acoustic Metamaterial (MLAM) solution for broadband low-frequency noise attenuation through double-peak sound transmission loss response

Roca,

Cante,

Lloberas-Valls

et al. 2021

Preprint

0

View full text Add to dashboard Cite

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.

show abstract

Improving sound insulation in low frequencies by multiple band-gaps in plate-type acoustic metamaterials

Cited by 28 publications

References 29 publications

Multiresonant Layered Acoustic Metamaterial (MLAM) solution for broadband low-frequency noise attenuation through double-peak sound transmission loss response

Multiresonant Layered Acoustic Metamaterial (MLAM) solution for broadband low-frequency noise attenuation through double-peak sound transmission loss response

Prediction of acoustic wave transmission features of the multilayered plate constructions: A review

Multiresonant Layered Acoustic Metamaterial (MLAM) solution for broadband low-frequency noise attenuation through double-peak sound transmission loss response

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