FAA Moves to Replace Sonic Boom Ban with Noise-Based Standard, Opening Door to Overland Supersonic Flight
AeroMorning – John Smith – July 1, 2026
On June 30, 2026, the Federal Aviation Administration (FAA) issued a Notice of Proposed Rulemaking (NPRM) that would reshape the regulatory framework for civil supersonic flight over land in the United States.
The proposal would revise the long-standing regulatory prohibition on civil supersonic flight over land in the United States, replacing it with a performance-based acoustic regulation framework, shifting the regulatory focus from aircraft speed to measurable environmental acoustic impact at ground level.
Rather than maintaining a categorical ban on sonic booms, the proposed rule would allow supersonic operations provided aircraft demonstrate compliance with an FAA-defined ground-level acoustic performance requirement.
The framework references “Mach cut-off” conditions, in which atmospheric refraction effects may prevent shock waves from reaching the ground. This phenomenon is treated as a variable propagation condition and not as a certification requirement.
Conclusion
The FAA proposal would replace a categorical prohibition with a performance-based acoustic certification system supported by defined Means of Compliance rather than a single prescriptive methodology.
By combining controlled cross-sectional area distribution, distributed shock generation, and validated propagation modelling, next-generation aircraft such as Boom Supersonic’s Overture and NASA’s X-59 aim to achieve compliance through measurable ground-level acoustic performance.
If adopted, the NPRM would establish a certification framework in which supersonic flight over land is governed not by speed alone, but by demonstrable compliance with FAA-accepted acoustic performance criteria.
Source: FAA
