THE LOW BOOM FLIGHT DEMONSTRATOR (LBFD) CONTRACT IS FOR THE DESIGN, CONSTRUCTION, AND FLIGHT VALIDATION OF A RESEARCH AIRCRAFT THAT CREATES A SHAPED SONIC BOOM SIGNATURE WITH A CALCULATED LOUDNESS LEVEL OF 75 PLDB [PERCEIVED LEVEL (PL), DECIBELS (DB)] OR LESS DURING SUPERSONIC CRUISE (MACH = 1.4) FLIGHT.

National Aeronautics and Space Administration