Amplitude coda of classical waves in disordered media

TL;DR

This paper investigates how classical waves behave in disordered media, predicting damped oscillations in the wave response that depend on scatterer density, using the Green function approach.

Contribution

It introduces a theoretical analysis of wave coda in disordered media based on the averaged Green function, highlighting the influence of scatterer density on oscillation periods.

Findings

Damped oscillations occur in the wave coda behind the direct pulse.

Oscillation periods are governed by the density of scatterers.

The study provides a theoretical framework for understanding wave propagation in disordered systems.

Abstract

The propagation of classical waves in the presence of a disordered medium is studied. We consider wave pulses containing a broad range of frequencies in terms of the configurationally averaged Green function of the system. Damped oscillations in the time-dependent response trailing behind the direct arrival of the pulse (coda) are predicted, the periods of which are governed by the density of scatterers.