NASA will test quiet supersonic jet using 30-mile-long microphone array

Quiet supersonic jets may one day fly over land to offer faster commercial and passenger flights. Before that can happen, however, the FAA will need to establish new rules regarding these typically noisy flights. To help usher in that era, NASA plans to test Lockheed Martin’s X-59 QueSST, an experimental supersonic jet that produces a ‘thump’ instead of a ‘boom,’ …