Modelling the effects of a random medium on direct and refected sound signals from a moving source

Paper in proceeding, 2024

Randomnesses in acoustic propagation conditions affect the signal at a receiver placed at a distance from the source. Without any refecting surface the random medium causes fuctuations in amplitude and phase of the received signal. In the presence of a wave refecting surface, a version of the signal with other fuctuations is added at the receiver, with some amount of correlation between the direct signal and the refected signal. A method is presented that in a single approach includes the random fuctuations of the received signals and the decorrelation effect for signal pairs. Numerical examples are calculated and validated in terms of mutual coherence functions by comparison with analytical solutions for different conditions of atmospheric turbulence. Exemplifying sounds with different source signals are produced for a moving source.