Acoustic enhancement and weak signal detection based on quasibound states in the continuum

IF 4.3 2区工程技术 Q1 ACOUSTICS

Journal of Sound and Vibration Pub Date : 2024-11-23 DOI:10.1016/j.jsv.2024.118856

Junrui Jiao, Chengyong Wang, Dejie Yu

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引用次数: 0

Abstract

Acoustic signal detection is important in several fields of research. However, realizing weak-signal detection remains a challenge. Recently, the bound state in continuum (BIC) has attracted considerable attention because of its ultrahigh quality-factor (Q-factor) and strong field enhancement. In this study, we achieved two Fabry–Perot BICs (bonding and anti-bonding BICs) in a coupled-resonator system and a mirror-induced BIC in a single-resonator system. And the acoustic enhancement from quasi-BICs of the coupled-resonator system and single-resonator system was investigated in the simulation. Compared to the coupled-resonator system, the amplification performance of the single-resonator system was better and verified in the experiment. The experimental results agreed with the numerical results, and the maximum pressure magnification was approximately 28×. Furthermore, the single-resonator system enhanced the weak harmonic signal, weak periodic impulse signal, and weak modulated signal in the presence of strong background noise, making signal detection much easier. We believe that this work provides a new method to realize weak signal detection based on acoustic enhancement.

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基于连续介质中准束缚态的声增强和弱信号检测

声信号检测在许多领域的研究中占有重要地位。然而，实现弱信号检测仍然是一个挑战。近年来，连续介质束缚态（BIC）因其超高质量因子（q因子）和强场增强而受到广泛关注。在这项研究中，我们在一个耦合谐振器系统中实现了两个Fabry-Perot BIC（成键和反键BIC），在一个单谐振器系统中实现了一个镜像诱导BIC。仿真研究了耦合谐振器系统和单谐振器系统的准bic对声学的增强作用。与耦合谐振器系统相比，单谐振器系统的放大性能更好，并在实验中得到了验证。实验结果与数值结果一致，最大压力放大倍数约为28倍。此外，在强背景噪声的情况下，单腔系统增强了弱谐波信号、弱周期脉冲信号和弱调制信号，使信号检测更加容易。我们认为这项工作为实现基于声增强的微弱信号检测提供了一种新的方法。

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

Journal of Sound and Vibration 工程技术-工程：机械

CiteScore

9.10

自引率

10.60%

发文量

551

审稿时长

69 days

期刊介绍： The Journal of Sound and Vibration (JSV) is an independent journal devoted to the prompt publication of original papers, both theoretical and experimental, that provide new information on any aspect of sound or vibration. There is an emphasis on fundamental work that has potential for practical application. JSV was founded and operates on the premise that the subject of sound and vibration requires a journal that publishes papers of a high technical standard across the various subdisciplines, thus facilitating awareness of techniques and discoveries in one area that may be applicable in others.