Within a time span of 15 years, acoustic metamaterials have emerged from academic
curiosity to become an active field driven by scientific discoveries and diverse application …

Noise pollution impacts the well-being of millions of people on a daily basis and can lead to
serious health issues such as hearing loss and stress. Developing efficient yet cost-effective …

Recent advances in the field of low-power electronic components production have spurred
research in energy harvesting. Ambient sound can be used as a source of energy, and the …

Performance of classic sound absorbing materials strictly depends on their thickness, with a
minimum of one-quarter wavelength to reach full sound absorption. In this paper, we report …

We propose a hybrid acoustic metamaterial as a super absorber for a relatively broadband
low-frequency sound based on a simple construction with deep-subwavelength thickness (5 …

Cellular solids have gained extensive popularity in different areas of engineering due to
their unique physical and mechanical properties. Recent advancements in manufacturing …

Phononic crystals and acoustic metamaterials are periodic structures whose effective
properties can be tailored at will to achieve extreme control on wave propagation. Their …

We propose a sound absorbing material efficient for low frequency. This material is mainly
composed of two axially coupled tubes in series, which are co-planarly coiled in a plane …

Functionally gradient materials (FGM) have gradual variations in their properties along one
or more dimensions due to local compositional or structural distinctions by design …

Acoustic metamaterials have been widely investigated over the past few decades and have
realized acoustic parameters that are not achievable using conventional materials. After …