Akustische Metamaterial-Energiegewinnung

We survey the more recent developments, which include compact phase manipulation structures, superabsorption, and actively controllable

What are acoustic metamaterials?

Acoustic metamaterials can be categorized into two types: phononic crystals, which utilize the Bragg scattering mechanism based on periodicity , and acoustic metamaterials, which are based on local resonance [, , , ].

Why should acoustic metamaterials be broadened?

Hence, broadening the frequency range of operation of acoustic metamaterials is an obvious direction for solidifying their roles in diverse applications. Acoustic metamaterials are also expected to affect ultrasonic acoustics, where countless applications (such as medical imagining) lie.

What is a membrane-based acoustic metamaterial?

Langfeldt et al. (2016) spearheaded the creation of a membrane-based acoustic metamaterial, which features externally controllable membrane materials. This innovative material is an active acoustic metamaterial, controllable through mechanical means.

Are acoustic and mechanical metamaterials a good option for energy harvesting?

Acoustic and mechanical metamaterials offer a great opportunity for enhanced energy harvesting. The latest research in metamaterial-enabled energy harvesting and self-powered is discussed. Perspective for future direction for metamaterial research is also addressed.

How to calculate energy bands of acoustic metamaterials?

Typical approaches for computing the energy bands of acoustic metamaterials encompass the finite difference time domain technique , , the plane wave expansion approach , , , , , the multiple scattering method, and the transfer matrix method , , , , .

Can metamaterials control acoustic waves?

The use of such materials in metamaterials has the potential to provide control over a broader spectrum of manipulations of acoustic waves. Zhai et al. (2013) designed a hollow, longitudinally resonant tube and conducted experiments in free space to analyze its transmission and reflection parameters.