| Issue |
J. Phys. IV France
Volume 04, Number C5, Mai 1994
3ème Congrés français d'acoustique3rd French conference on acoustics |
|
|---|---|---|
| Page(s) | C5-969 - C5-972 | |
| DOI | https://doi.org/10.1051/jp4:19945212 | |
3ème Congrés français d'acoustique
3rd French conference on acoustics
J. Phys. IV France 04 (1994) C5-969-C5-972
DOI: 10.1051/jp4:19945212
Ecole Centrale de Lyon, Laboratoire de Mécanique des Fluides et d'Acoustique, URA 263 du CNRS, ECL, BP. 163, 69131 Ecully cedex, France
© EDP Sciences 1994
3rd French conference on acoustics
J. Phys. IV France 04 (1994) C5-969-C5-972
DOI: 10.1051/jp4:19945212
Influence d'une turbulence thermique sur la propagation du son dans l'atmosphère en présence d'une zone d'ombre
P. CHEVRET and Ph. BLANC-BENONEcole Centrale de Lyon, Laboratoire de Mécanique des Fluides et d'Acoustique, URA 263 du CNRS, ECL, BP. 163, 69131 Ecully cedex, France
Abstract
A numerical technique for simulating the acoustic wave propagation through a turbulent atmosphere is introduced. We first generate a random homogeneous and isotropic medium by creating N independent realizations in terms of discrete Fourier modes. Then, for each realization, we solve a parabolic equation using a Split step Padé algorithm. Finally, we calculate the mean intensity of the acoustic field and its phase and amplitude fluctuations. Our numerical results are compared with outdoor measurements.
© EDP Sciences 1994