Sound waves travel at approximately 750 mph at sea level, but slow down at higher altitudes. The speed of sound is called "Mach 1." Supersonic refers to speeds from Mach 1 to Mach 5 (1 to 5 times ...

A prototype of a passenger jet designed to succeed the supersonic Concorde broke the sound barrier for the first time on Tuesday above the Mojave Desert in California. Why it matters: Exceeding Mach 1 ...

Boom Supersonic’s XB-1 has broken the sound barrier, paving the way for faster commercial flights if future tests succeed.

Boom's Supersonic XB-1 jet became the “world’s first independently developed supersonic jet” to break the sound barrier Tuesday.

The T-Flight is a Hyperloop-inspired system that combines maglev technology — which uses powerful electromagnets to literally ...

Also briefly traveling above the speed of sound was British Airways Flight 274, which hit a top ground speed of 814 mph during a trip to London from Las Vegas, per Flightradar24 data. The Airbus ...

Pilots have been exploiting the augmented jet stream to coast across the Atlantic Ocean at speeds of up to 840 mph — which is faster than the speed of sound, the outlet reported. The planes didn ...

or about 750 mph, according to a press statement from Boom. The measurement "Mach" refers to the speed of an object in relation to the speed of sound in the surrounding medium, with Mach 1 ...