The Republic XF-84H was a special airplane that was designed to go very fast and make a very loud noise. It was also called the "Thunderstreak" because it made such a loud noise.
The plane had a special engine called a ramjet engine. This engine worked by using the air going into the plane to make it go faster and faster.
The problem was that the engine made such a loud noise that it was not safe for people to be around it when it was running. In fact, the noise was so loud that it would make people feel sick and dizzy!
So the engineers who designed the plane put a special device on it called a "noise suppressor." This device was supposed to make the engine quieter, but it didn't work very well.
In the end, the XF-84H was not used very much because it was too noisy and not safe for people to be around. But it was still a very special and interesting plane!