Strongly coupled phononic crystals resonator with high energy density for acoustic enhancement and directional sensing

Chen, Tinggui; Jiao, Junrui; Yu, Dejie

doi:10.1016/j.jsv.2022.116911

Cited by 13 publications

(3 citation statements)

References 39 publications

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“…developed a structure that couples phononic crystal point defect with Helmholtz resonators to realize a high energy density acoustic enhancement for directional sensing [81]. Besides the cavity resonance principle, topological acoustic valley transport (Figure 2C) [67] and near-zero index [82] implemented by phononic crystals can also be designed to enable a unique beamforming mechanism that renders a super-directive needle-like sound reception pattern.…”

Section: Figurementioning

confidence: 99%

Spatial information coding with artificially engineered structures for acoustic and elastic wave sensing

Jiang

2022

Front. Phys.

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Acoustic and elastic waves carry a wealth of useful physical information in real world. Sensing acoustic and elastic waves is very important for discovering knowledge in various fields. Conventional wave sensing approaches generally require multiple expensive sensors and complex hardware systems due to the uniform spatial transmission characteristics of physical fields. These limitations prompt the development of wave sensing strategies with high integration degree, lightweight structure, and low hardware cost. Due to their extraordinary physical properties, artificially engineered structures such as metastructures can encode the physical field information by flexibly manipulating the transmission characteristics of acoustic and elastic waves. The fusion of information coding and wave sensing process breaks through the limitations of conventional sensing approaches and reduces the sensing cost. This review aims to introduce the advances in spatial information coding with artificially engineered structures for acoustic and elastic wave sensing. First, we review the enhanced spatial wave sensing with metastructures for weak signal detection and source localization. Second, we introduce computational sensing approaches that combines the spatial transmission coding structures with reconstruction algorithms. Representative progress of computational sensing with metastructures and random scattering media in audio source separation, ultrasonic imaging, and vibration information identification is reviewed. Finally, the open problems, challenges, and research prospects of the spatial information coding structures for acoustic and elastic wave sensing are discussed.

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Section: Figurementioning

confidence: 99%

Spatial information coding with artificially engineered structures for acoustic and elastic wave sensing

Jiang

2022

Front. Phys.

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“…Within the band gap, the PC experiences a evanescent wave, with its amplitude exponentially decaying in the direction of the incident Crystals 2023, 13, 1196 2 of 14 wave. Numerous studies have focused on enhancing the localization of acoustic energy through defects in PCs [24][25][26][27]. Refs.…”

Section: Introductionmentioning

confidence: 99%

Phononic Crystal Coupled Mie Structure for Acoustic Amplification

Han,

Hao,

Yang

et al. 2023

Crystals

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In the field of industrial structure detection, acoustic signals have been pivotal. A cost-effective and highly sensitive acoustic monitoring system that can enhance weak acoustic signals has always been an interesting topic in many research fields. However, environmental noise signals have consistently hindered the improvement of the signal-to-noise ratio (SNR) of traditional acoustic systems. In this work, we propose a structure (PC-Mie) that couples phononic crystal (PC) point defects and Mie resonance structures (Mies) to enhance weak effective signals from complex environments. Numerical simulations have confirmed that the PC-Mie exhibits superior sound pressure enhancement performance compared to each individual PC point defect and Mies. Moreover, the capability to amplify the sound pressure amplitude is related to the angle and position of the Mies at the center position. Simultaneously, the PC-Mie has a narrower bandwidth, giving the structure stronger frequency selectivity. Finally, the experiment proves that PC-Mie can function as an enhanced acoustic device or sensor to detect harmonic signals, verifying the validity of the PC-Mie structure for acoustically enhanced perception. Both numerical and experimental studies demonstrate that the PC-Mie can effectively enhance the energy of specific sound frequencies in complex air environments, making it suitable for collecting high-sensitivity acoustic signals. This research has significant implications for the development of weak acoustic signal detection technology and the application of self-powered sensors.

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“…In recent years, there has been a lot of interest in using periodic media in different acoustics 1,2 and optics applications [3][4][5][6][7][8][9][10][11][12] . Acoustic devices with good performance are vital in biosensing 13 , acoustic communication 14 , gas detection 15 , etc. The occurrence of sound wave dispersion and forbidden frequency bands in phononic crystals (PnCs) has increased interest in them.…”

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confidence: 99%

Simulation study of gas sensor using periodic phononic crystal tubes to detect hazardous greenhouse gases

Zaky

Alamri

Zohny

et al. 2022

Sci Rep

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Here, we investigate a gas sensor model based on phononic crystals of alternating tubes using the transfer matrix method to detect hazardous greenhouse gases. The effect of the thicknesses and cross-sections of all tubes on the performance of the proposed sensor is studied. The results show that longitudinal acoustic speed is a pivotal parameter rather than the mass density variations of the gas samples on the position of the resonant peaks due to its significant impact on the propagation of the acoustic wave. The suggested sensor can be considered very simple and low-cost because it does not need a complicated process to deposit multilayers of different mechanical properties’ materials.

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Strongly coupled phononic crystals resonator with high energy density for acoustic enhancement and directional sensing

Cited by 13 publications

References 39 publications

Spatial information coding with artificially engineered structures for acoustic and elastic wave sensing

Spatial information coding with artificially engineered structures for acoustic and elastic wave sensing

Phononic Crystal Coupled Mie Structure for Acoustic Amplification

Simulation study of gas sensor using periodic phononic crystal tubes to detect hazardous greenhouse gases

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