ORIGINAL RESEARCH article
Front. Phys.
Sec. Physical Acoustics and Ultrasonics
Volume 13 - 2025 | doi: 10.3389/fphy.2025.1586858
Enhanced Fano-type Broadband Acoustic Ventilated silencer with Arbitrary Geometrical Configurations
Provisionally accepted
- 1Nanjing Research Institute of Electronic Technology, Nanjing, China
- 2The Unit 93209 of People’s Liberation Army, Beijing, China
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The introduction of Fano resonance into acoustic metamaterials provides the possibility for simultaneous airborne sound insulation and high-efficiency ventilation, while the ultranarrow Fano line shape and limited shape configurations restrict the expansion to practical applications. In this work, we theoretically propose and demonstrate a broadband low-frequency ventilation acoustic chiral barrier with arbitrary geometrical configurations, where consecutive multiple Fano resonances (CMFRs) generate destructive interference in the range of 479-1032 Hz. The barrier unit with a binary planar design is composed of the chiral space-coiling tunnel and hollow pipe, providing the discrete resonant and continuum states for Fano resonant system. By means of judiciously tuning the coupling of the above-mentioned two states, multi-order Fano resonances manifest as low transmission in a wide frequency range.Good agreement between simulated, theoretical, and measured results validates the effectiveness of the proposed barrier in the broad low-frequency range, in which the laminar and turbulent flow models reveal the high air-permeability of our barrier.Thanks to the unit planar profile, we can flexibly customize the arbitrary geometrical configurations of the barrier to extend into three-dimensional (3D) space for practical noise reduction applications. Our research makes it possible to construct ventilation artificial metastructure with a flexible manner for broadband sound attenuation.
Keywords: acoustic, Metamateials, Silencer, Fano resonance, broadband insulating
Received: 03 Mar 2025; Accepted: 15 May 2025.
Copyright: © 2025 Xu, Fang and Wang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
ZiXiang Xu, Nanjing Research Institute of Electronic Technology, Nanjing, China
Yu Fang, Nanjing Research Institute of Electronic Technology, Nanjing, China
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