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.
Cotté
Benjamin
B
LMFA, UMR CNRS 5509, Ecole Centrale de Lyon, 69134 Ecully Cedex, France. benjamin.cotte@ec-lyon.fr
Blanc-Benon
Philippe
P