Achieving quieter environments in air and space transport

Winkler et al discuss several studies which aim to help achieve quieter environments in air and space transport. The Aeroacoustics Technical Committee addresses the noise produced by the motion of fluids and bodies in the atmosphere and the responses of humans and structures to this noise. NASA conducted tests on a new spacecraft cabin ventilation fan, measuring sound power levels using a microphone array. The fan's geometry was published to support further research on low-noise fans for space missions. Joby Aviation also began wind tunnel testing its electric air taxi propellers at NASA's Ames Research Center. The data collected will aid in obtaining FAA certification. Meanwhile, Pratt and Whitney and RTX Technology Research Center completed aerodynamic drag measurements on noise optimized liner architectures for commercial engine fan ducts. NASA announced a three-year initiative led by Boston University to develop prediction tools for community noise of advanced air mobility aircraft.