Mesoscopic phase statistics of diffuse ultrasound in dynamic matter

TL;DR

This paper investigates the phase fluctuations of ultrasonic waves in dynamic mesoscopic media, demonstrating phase statistics as a sensitive tool for probing scatterer motions across different time scales.

Contribution

It introduces a theoretical framework for phase statistics in ultrasonic wave scattering and highlights their effectiveness in analyzing scatterer dynamics.

Findings

Phase fluctuations follow circular Gaussian statistics.

Phase statistics effectively probe scatterer motions.

Ultrasonic phase analysis reveals dynamics at multiple time scales.

Abstract

Temporal fluctuations in the phase of waves transmitted through a dynamic, strongly scattering, mesoscopic sample are investigated using ultrasonic waves, and compared with theoretical predictions based on circular Gaussian statistics. The fundamental role of phase in Diffusing Acoustic Wave Spectroscopy is revealed, and phase statistics are also shown to provide a sensitive and accurate way to probe scatterer motions at both short and long time scales.