Acoustic Metamaterials
Structures that control, direct or manipulate acoustic waves.
Active-Learning-Guided Acoustic Metamaterial Resonators for Low-Frequency Noise Suppression and Piezoelectric Energy Harvesting
Active-learning-guided inverse design enables scalable acoustic metamaterial resonators that suppress low-frequency noise and harvest acoustic energy using integrated piezoelectric stacks.
Hydrogel-based flexible metamaterial for underwater acoustic carpet cloaking
A hydrogel-based flexible metamaterial is proposed for underwater acoustic carpet cloaking.
Optimal Design of an Acoustic Lens with Anisotropic Metamaterial
By optimizing the sizes of random rigid scatterers in an anisotropic acoustic metamaterial, the lens achieves subwavelength focusing beyond the diffraction limit.
Invisible design and acoustic scattering of metamaterial plates with active feedback control
Active feedback-controlled metamaterial plates are designed to reduce low-frequency acoustic scattering by tuning dynamic effective density, enabling “invisible” behavior for underwater vehicles.
Thin Acoustic-Composite Structures With Metamaterial Inclusions for Enhanced Low-Frequency Sound Absorption
Thin porous acoustic composites with tunable labyrinthine metamaterial inclusions achieve enhanced low-frequency absorption via multiresonant behavior confirmed by acoustic tests.
Transmission loss of a labyrinthine acoustic metamaterial augmented with multichannel feedforward active noise control
A labyrinthine acoustic metamaterial is augmented with multichannel feedforward active noise control to improve transmission loss.
Inverse design of acoustic metamaterial sound barriers for road traffic noise control
An inverse-design framework links measured road-noise spectra to optimized nested-Helmholtz acoustic metamaterial unit cells, yielding broader bandgap attenuation confirmed by impedance-tube tests and field trials.
Design and development of one-dimensional acoustic bundle ventilated metamaterial
A one-dimensional kink-fiber acoustic meta-structured blanket is proposed and validated to enable broadband sound absorption while permitting airflow through the structure.
Acoustic Metamaterial Nanogenerator for Multi-Band Sound Insulation and Acoustic–Electric Conversion
An acoustic metamaterial nanogenerator uses multi-local resonance to deliver tunable multi-band sound insulation (up to 40 dB) while converting low-frequency sound into electricity via a TENG.
Duct Metamaterial Muffler with Composite Acoustic Porous Media: Acoustic Optimization via Periodic Arrangement, Particle Swarm Optimization and Experimental Validation
A composite acoustic porous duct metamaterial muffler with periodic tortuous channels and optimized porous layers achieves improved broadband transmission loss validated by experiments.
Ultra-broadband acoustic metamaterial lens for loudspeaker directivity control
An ultra-broadband acoustic metamaterial lens enables passive loudspeaker directivity control across wide frequency ranges.
Overcoming dead zones in ultrasonic sensors with acoustic metamaterial
Helmholtz resonator-based acoustic metamaterials reduce ultrasonic group velocity near resonance, improving time resolution and enabling more accurate distance sensing within the sensor dead zone.
Acoustic metamaterial in low-frequency underwater noise mitigation
A lightweight, 3-D-printed acoustic metamaterial is proposed and lab-tested to attenuate wide-band low-frequency underwater noise via sound insulation.
Metamaterial acoustic barriers for traffic noise control in urban zones
Geometrically periodic acoustic metamaterial barriers, tested at 1:10 scale, can reduce traffic noise, with porous polyethylene layers improving absorption over a wide frequency range.
Unlocking acoustic magic: Machine learning for on-demand metamaterial design
Machine learning and generative inverse design are being used to engineer acoustic metamaterial structures that meet specified performance targets, aiming to reduce simulation cost and expand design space.
A data-driven framework for predicting the acoustic performance of metamaterial arrays
A data-driven framework combines unit-level surrogate models with limited full-array simulations to efficiently predict array-level acoustic transmission loss for complex metamaterial panels.
Input impedance-matching metamaterial to enhance ultrasonic pulse transmission through an acoustic barrier
An impedance-matching acoustic metamaterial with a virtual intermediate layer improves ultrasonic pulse transmission through an acoustic barrier, experimentally boosting transmitted energy by 7.78×.
Dynamic shaping of multi-touch stimuli by programmable acoustic metamaterial
A programmable acoustic metamaterial is used to dynamically shape multi-touch stimuli.
Incorporating extended neck Helmholtz resonators into an advanced multi-degree of freedom acoustic metamaterial for low-frequency, broadband acoustic absorption
An advanced multi-degree-of-freedom acoustic metamaterial is designed by incorporating extended neck Helmholtz resonators to target low-frequency, broadband sound absorption.
Interpretable SHAP-bounded Bayesian optimization for underwater acoustic metamaterial coating design
An interpretability-informed Bayesian optimization method uses SHAP to refine design-space bounds and improve underwater acoustic metamaterial coating designs without extra simulations.
Study on Acoustic Metamaterial Unit Cells: Acoustic Absorption Characteristics of Novel Tortuously Perforated Helmholtz Resonator with Consideration of Elongated Acoustic Propagation Paths
A perforated, tortuous Helmholtz-resonator unit cell is modeled and optimized to extend acoustic path length and improve low-frequency broadband sound absorption for duct mufflers.
Gear acoustic metamaterial bandgap sound insulation characteristics and optimized design
A gear acoustic metamaterial is optimized (via genetic algorithm) to widen its acoustic bandgap, yielding broadband noise reduction with experimentally reported ~29.6 dB insulation in the band.
Acoustic Wavefront Shaping Using Ultrahigh Phase Resolution Metamaterial
A transmissive acoustic metamaterial unit cell with a rotated bilateral symmetrical T-shaped structure provides high phase-delay resolution for sound focusing and steering.
Fundamental absorption bandwidth to thickness limit for transparent homogeneous layers
A universal bandwidth-to-thickness limit for transparent homogeneous absorber layers is derived via Kramers–Kronig relations and supported by simulations and metamaterial modeling.