The X-15
The speed of light is faster than the speed of sound. This means that light waves, carrying visual information, will reach your eyes before sound waves reach your ears. This is why you see the fighter plane first before hearing it.
The first plane was the experimental Ball X-1.
The first such plane was the experimental Bell X-1.
There was not a special name for the first flight that went faster than the speed of sound. However, when a plane does go faster than sound, it said to be traveling at supersonic speeds.
You would hear the sound after the plane has passed.
The Concord's speed was 1,176. Faster than the speed of sound
No, the Tupolev Tu-144 was the only other commercial plane to date to fly faster then the speed of sound.
Concorde
Supersonic aircraft, such as the Concorde, were able to fly faster than the speed of sound. They achieved this by using advanced aerodynamic designs and powerful engines. However, due to high operating costs and noise concerns, supersonic commercial flights are currently limited.
As altitude increases (to about 35,000 ft) air density, pressure and temperature all drop. As density decreases speed of sound increases, but with drop in pressure it drops; these two practically cancel each other out. As temperature drops, speed of sound drops. Thus at 15,000 ft the speed of sound is slower than at 6,000 ft so plane X is flying faster than plane Y.
ultra sonic !!
when the plane goes faster than the speed of sound then the plane is seen first and the sound is heard after the plane has passed away. In this case the plane is having speed more than 1 mach.