Wind tunnel study of 3D sound propagation in presence of a hill and of a wind gradient
Abstract
The 3D propagation of sound is here experimentally determined in a wind tunnel, in the presence of such finite-dimensioned objects as a hill or screen, in conjunction with wind gradient effects. In these experiments, time-delay spectrometry was used to separate direct waves from those reflected by the upper and lateral walls of the tunnel. In the case of transverse sound propagation, wind gradients do not sensibly modify the location of the scattering pattern of the shadow zone of the obstacle relative to the windless condition; the gradient effect appears to be important only in upwind and downwind configurations.
- Publication:
-
ONERA TP
- Pub Date:
- 1993
- Bibcode:
- 1993ONERA....R....M
- Keywords:
-
- Acoustic Propagation;
- Three Dimensional Models;
- Topography;
- Wind Profiles;
- Wind Tunnel Tests;
- Atmospheric Turbulence;
- Scale Models;
- Sound Pressure;
- Sound Waves;
- Temperature Gradients;
- Wind Velocity;
- Acoustics