Aeroacoustic Wind Tunnel
- Intensity probe in the flow
While the drive train noise dominates when starting up and during acceleration processes in the lower speed range, at other operating points up to approx. 130 km/h, the tire-road noise is the most important noise component. At higher speeds, the aerodynamic noise constantly increases in importance since its acoustic power increases with approx. the 6th power of speed, while the tire-road noise generally increases only with the 3rd to 4th power.
The isolated acquisition of the aerodynamic noise of vehicles in conventional wind tunnels has shown to be complicated or even impossible, especially if it concerns the aerodynamic exterior noise. For this reason, aeroacoustic wind tunnels are indispensable for noise optimization in the upper speed range.
- Radiation pattern of a vehicle
