This paper proposes a novel multifunctional ultra-thin membrane based on a
Polyborosiloxane-based gel with stimuli-responsive sound absorption and sound …

The interest of aerospace and automotive fields in the improvement of energy absorption
properties of composite materials has stimulated researchers to design new typologies of …

Detection of defects located close to design features such as welds and supports remains a
challenge in guided ultrasonic wave inspection, primarily due to the diffraction limit …

Acoustic metamaterials manufactured from natural materials can exhibit exotic
characteristics that cannot be found in nature materials through the design of geometric …

Grain size has an essential influence on the serviceability of metallic materials. In this paper,
a noncontact laser ultrasonic testing platform is built to study the effect of copper grain size …

This article explores the use of acoustical metamaterials to design lenses in the megahertz
frequency range of relevance to applications in nondestructive testing and medical imaging …

We presented tri-band negative modulus acoustic metamaterials (AM), whose operation
characteristics could be flexibly designed by changing the three hole sizes (ie, a 1, a 2, and …

Acoustic waveguides offer the separation of the transducers aperture from the radiating
aperture. In previous work, we used this design freedom to build air-coupled phased arrays …

Due to the huge structure and low efficiency of acoustic metamaterial (AM) with local
resonance, a tunable dual-band AM with nested double layer hollow tube (NDLHT) is …

Rotating machine fault signal extraction becomes increasingly important in practical
engineering applications. However, fault signals with low signal-to-noise ratios (SNRs) are …