Aerodynamic noise source measurement system for a motor vehicle
AssigneeDaimlerChrysler AG
InventorsJean Mallebay-Vacqueur, Mitchell Puskarz
Life of this patent
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Abstract
An aerodynamic noise measurement system for a vehicle uses sound reflectors to determine the sound wave propagation of aerodynamic noise of the vehicle. The vehicle is placed within a test section of a wind tunnel. The air flow of the wind tunnel generates the aerodynamic noise as it passes over the vehicle. An array of sound reflectors is placed outside of the air flow of the wind tunnel. Microphone arrays receive the aerodynamic noise directly from the source and from the sound reflectors. An analyzer system forms an acoustic image of the vehicle based on the aerodynamic noise. A viewing device displays an image of the vehicle with an overlay of aerodynamic noise data in real-time.
Claims20
An aerodynamic noise measurement system for a vehicle comprising:
- a wind tunnel that generates a flow of air;
- a test area within the flow of air;
- a plurality of sound reflectors arranged outside of the flow of air, wherein each of the sound reflectors includes a microphone array that measures aerodynamic noise that is generated by a vehicle in the test area and wherein the microphone array generates data signals indicative of the aerodynamic noise;
- and
- an analyzer system that receives the data signals and generates one of a noise map and an image of the vehicle based on the data signals.
An aerodynamic noise measurement method comprising:
- generating a flow of air;
- locating a vehicle within the flow of air;
- measuring aerodynamic noise from the vehicle at a plurality of sound reflectors arranged outside the flow of air;
- generating data signals indicative of the aerodynamic noise;
- generating one of a noise map and an image of the vehicle based on the data signals.
Dependencies are inferred from the claim text.