Fluctuation and localization of acoustic waves in bubbly water

TL;DR

This paper investigates how acoustic waves localize in bubbly water, showing that strong localization occurs at specific frequencies and bubble concentrations, with fluctuations diminishing as localization sets in.

Contribution

It demonstrates the fluctuation behavior of acoustic waves in bubbly water and identifies conditions for wave localization based on transmission and phase fluctuations.

Findings

Localization occurs at certain frequencies and bubble densities

Fluctuations of transmission and phase decrease during localization

Wave localization can be identified by vanishing fluctuations

Abstract

Here the fluctuation properties of acoustic localization in bubbly water is explored. We show that the strong localization can occur in such a system for a certain frequency range and sufficient filling fractions of air-bubbles. Two fluctuating quantities are considered, that is, the fluctuation of transmission and the fluctuation of the phase of acoustic wave fields. When localization occurs, these fluctuations tend to vanish, a feature able to uniquely identify the phenomenon of wave localization.