Whistling is one of the main sports? Permanent guest?
I believe everyone has noticed that no matter on the physical education class or on the sports ground, PE teachers or referees will wear a whistle on their chests, and the whistle represents the conductor on these occasions. Since when did whistle become the main sports ground? Permanent guest? So what?
This should also start with a football match. In the first football match of mankind, the role of the referee at that time was actually insignificant. At this time, the referee has not blown the whistle. In order to control the stadium, he basically shouted desperately by voice. At that time, in addition to athletes, there were a large number of spectators in the stadium. It is impossible to control the audience only by the referee's shouts. It is often the referee who shouts all over the court, but the athletes don't respond.
At that time, there was a football match in England. There was a small accident in this football match. It was this small accident that produced the referee whistle of the world yesterday morning. At that time, because of the anxiety about the game, there were some minor frictions between the players and fans of both sides. Just as the two sides were preparing for a big fight, a policeman who served as a referee blew a siren out of professional habit at this critical moment, which was the earliest referee whistle.
A small whistle can make such a loud noise.
Because the police referee sounded the siren in this game, people later realized the role of whistle in the game. In fact, whistling has a very long history. A long time ago, we humans used some free objects or plants to realize it, just like early musical instruments. At that time, someone made shells into whistles.
Now the whistle has evolved from the previous pea whistle to a seedless whistle. Although the pea whistle is relatively simple to make, it will often blow out a dumb whistle if the force is not allowed when blowing the whistle. So someone studied the original pea whistle and gradually transformed it into the present non-nuclear whistle through research. Non-nuclear whistle may sound like pea whistle, but it is far more than pea whistle in sound, which is the whistle we often see on the court now.