In July, Reuters reported that a U.S. push for relaxed global standards on aircraft noise was being met with resistance from European nations.
A U.S.-led revival of supersonic jets was reportedly facing delays as European states, including the U.K., France and Germany, held firm on refusing to pass new rules on noise needed for the aircraft to fly.
Despite uncertainty over regulation, the industry is moving closer to making commercial supersonic air travel a reality again.
Denver start-up Boom Technology is planning a test flight for its supersonic jet later this year. The company promises that the technology could halve flight times — for example, it says the plane could transport passengers from Washington, D.C. to London in just 3.5 hours. Flight times for that route are currently more than seven hours.
A spokesperson for Boom told CNBC via email that the firm’s aircraft was “designed not to be any louder than today’s commercial aircraft during takeoffs and landings,” adding that flights would only reach supersonic speed over water.
The company already has partnerships with Chinese travel agency Ctrip and Japan Airlines.
In November, Lockheed Martin began production of its supersonic plane, which will be test piloted by NASA. The defense giant is working to produce an aircraft capable of reaching the speed of sound without breaking the sound barrier — thereby preventing sonic booms.