Time-domain simulations of sound propagation in a stratified atmosphere over an impedance ground.
Finite-difference time-domain simulations of broadband sound propagation in a stratified atmosphere are presented. A method recently proposed to obtain an impedance time-domain boundary condition is implemented in a linearized Euler equations solver, which enables to study long range sound propagation over an impedance ground. Some features of the pressure pulse evolution with time are analyzed in both upward-and downward-refracting conditions, and the time-domain simulations are compared to parabolic equation calculations in the frequency domain to show the effectiveness of the proposed impedance boundary condition.
LMFA, UMR CNRS 5509, Ecole Centrale de Lyon, 69134 Ecully Cedex, France. benjamin.cotte@ec-lyon.fr
Benjamin
B
Cotté
Philippe
P
Blanc-Benon