Acoustic wave propagation in fluid metamaterial with solid inclusions

TL;DR

This paper investigates acoustic wave behavior in a fluid metamaterial with solid inclusions, revealing negative parameters, localized surface states, and anomalous modes, with implications for wave control.

Contribution

It introduces a novel analysis of acoustic wave propagation in a fluid metamaterial with solid double-layered inclusions, highlighting negative parameters and surface states.

Findings

Identified frequency ranges with negative constitutive parameters.

Discovered localized surface states at the interface.

Analyzed Doppler effect and anomalous modes in the metamaterial.

Abstract

Acoustic waves propagation of in composite of water with embedded double-layered silicone resin/silver rods is considered. Approximate values of effective dynamical constitutive parameters are obtained. Frequency ranges of simultaneous negative constitutive parameters are found. Localized surface states on the interface between metamaterial and "normal" material are found. Doppler effect in metamaterial is considered. Presence of anomalous modes are shown.