You would hear the sound after the plane has passed.
its simple the sound barrier is broken :D
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
In faster-than-sound flight, a plane can experience a shockwave known as a sonic boom. This is caused when the plane reaches and exceeds the speed of sound, resulting in a sudden, loud noise like a thunderclap. It is a strange phenomenon that can be disruptive and alarming for those on the ground.
It is going faster than the speed of sound.
The X-15
ultra sonic !!
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.
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.
As soon as the plane speeds up to go faster than sound, it may generate a 'sonic boom', which continues to sweep over the ground wherever the plane flies. Faster than that, there's no particular magic speed at which anything new suddenly magically happens. No aircraft, balloon, rocket ship, bullet, or anything else can fly faster than the speed of light.
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.