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 ...

Sound waves are vibrations that are passed on between particles. The speed of sound is the distance a sound travels divided by the time it takes.

A newly released image shows the sound barrier being broken on February 10 as Boom Supersonic’s XB-1, America’s first civil ...

A person fires a starting pistol. A distant observer stood 200 metres away (measured using a 20 m tape measure or trundle wheel) records the time between seeing the flash of light from the ...

In a major leap forward in the field of hypersonic flight, China has announced that an engine developed by it has shown to ...

Boom Supersonic, the company aiming to create commercial planes that can travel faster than the speed of sound, have ...

Venus Aerospace has completed the inaugural test flight of a drone fitted with its "rotating detonation rocket engine" (RDRE) — accelerating it to just under the speed of sound. The company ...

SPEEDY flights that blast off faster than the speed of sound look set to return to skies as a US company reveals huge progress on a new Concorde-like service. Boom's XB-1 jet, dubbed the "Son of ...

Commercial flights faster than the speed of sound have taken another step closer to reality. Boom Supersonic announced Monday that its airliner could fly above Mach 1 without producing a sonic ...

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 ...