Bidirectional gradient acoustic enhancement and collection based on the dual edge states

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2025-04-22 DOI:10.1016/j.apacoust.2025.110716

Yulin Li, Jian Li

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引用次数: 0

Abstract

With the development of topological phononic crystals (PCs), the unique physical properties such as topological protection and robustness provide many advantages for acoustic collection devices, including higher reliability, wider bandwidth, higher efficiency, and the potential for multi-directional collection. In this paper, we propose a valley topological PC based on plate trimer (PT-PC). The additional “inner cavity” introduced by PT structure also satisfies C_3V symmetry, which leads to the formation of two topologically protected edge bands with opposite group velocities on the single topological interface. Furthermore, based on PT-PC and rainbow trapping principle, a bidirectional gradient acoustic enhancement and collection structure (B-GAC) is designed, which has the characteristics of acoustic enhancement, wide bandwidth and two collection directions. The simulation and experiment prove that the structure can enhance and collect sound waves from two directions, with the bandwidth almost covering the entire bandgap. This research contributes to the development and engineering applications of wide-bandwidth, multi-directional acoustic energy harvesting, acoustic enhancement sensing and other topological acoustic devices.

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基于双边缘状态的双向梯度声增强与采集

随着拓扑声子晶体（topological phononic crystals, pc）的发展，其独特的物理特性，如拓扑保护和鲁棒性，为声学采集器件提供了更高的可靠性、更宽的带宽、更高的效率和多向采集的潜力。本文提出了一种基于平板三聚体（PT-PC）的谷型拓扑PC。PT结构引入的额外“内腔”也满足C3V对称，这导致在单个拓扑界面上形成两个具有相反群速度的拓扑保护边缘带。在此基础上，基于PT-PC和彩虹捕获原理，设计了一种双向梯度声增强和采集结构（B-GAC），该结构具有声增强、宽带宽和双采集方向的特点。仿真和实验结果表明，该结构能够从两个方向增强和收集声波，其带宽几乎覆盖整个带隙。本研究有助于宽带、多向声能采集、声增强传感等拓扑声学器件的开发和工程应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Acoustics 物理-声学

CiteScore

7.40

自引率

11.80%

发文量

618

审稿时长

7.5 months

期刊介绍： Since its launch in 1968, Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense. Applied Acoustics looks not only at recent developments in the understanding of acoustics but also at ways of exploiting that understanding. The Journal aims to encourage the exchange of practical experience through publication and in so doing creates a fund of technological information that can be used for solving related problems. The presentation of information in graphical or tabular form is especially encouraged. If a report of a mathematical development is a necessary part of a paper it is important to ensure that it is there only as an integral part of a practical solution to a problem and is supported by data. Applied Acoustics encourages the exchange of practical experience in the following ways: • Complete Papers • Short Technical Notes • Review Articles; and thereby provides a wealth of technological information that can be used to solve related problems. Manuscripts that address all fields of applications of acoustics ranging from medicine and NDT to the environment and buildings are welcome.