NASA Completes Flight Trials Of Gear And Flap Noise-Reduction Technology Written 19 June 2018

Aviation Week reports that NASA is analyzing noise data from “recently completed flight trials of a modified Gulfstream III at Armstrong Flight Research Center in California.” The tests ending in late April completed a “four-year program that initially investigated the aerodynamic efficiency of a shape-changing flexible flap.” The technology could “pave the way” for new noise-reduction components in future business and commercial aircraft. 
More Info (Aviation Week)