Professor Alexander is an experimentalist whose research focuses on aeroacoustic and fluid dynamic phenomena. His research is supported by a diverse group of sponsors including NASA, ONR, and leading wind turbine manufacturers. His current projects include the analysis of broadband fan noise, boundary layer flow over rough, elastic, and porous walls, phased microphone array processing techniques, and the noise produced by small unmanned systems. He is also working on the development of a novel bio-inspired trailing edge noise reduction treatment for high Reynolds number airfoils. This surface treatment is designed to mimic the down on the surface of an owl’s wing altering the near-wall turbulence. This technology has the potential for impact in the areas of wind energy, airframe noise, and hull vibration and noise.