Sport whistles

A whistle is an instrument that emits sound with the help of a gas - usually an air stream. Whistles have been used since people learned to carve a hole in a branch or pumpkin and use them to spread sounds. In ancient Egypt, small shells were used instead of whistles, later bones or wood. With the increase of mechanical power, more modern forms of whistles were created, metal, plastic, etc. were started to be produced. whistles.

One of the characteristics of a whistle is that it emits extremely loud pure or near-pure sound. This sound travels quite a long distance, so the whistles come in handy for signaling. Whistles are used not only in professional sports (basketball, swimming, football, etc.), but also in shipping, police, cynologists and so on.

The choice of whistle depends on who needs the signal. For example, a football referee will choose a whistle to be heard further, and a swimming coach will choose one who can be heard underwater.