Sensors and Instrumentation for Aeroacoustic Noise Characterization and Assessment

Experimental aeroacoustic testing has undergone a radical transformation over the last 25 years with the development of novel microphone phased array measurement systems. These phased arrays are now routinely used in wind tunnel testing to identify the source and strength of radiated noise generated by aerodynamic models. They are also increasingly being used for the characterization of generated noise in full-scale flyover flight testing. This webcast will give an overview of the fundamentals of microphone phased array measurements. Examples of both ground test and flight campaigns will be given where the microphone array was the primary sensor system used to collect information regarding baseline acoustics and the effectiveness of noise reduction treatments for subsonic fixed-wing airframes.

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