篮Ball referee basic skills - whistle
    Referee's whistle is like on the battlefield generals commanding Dao hands， baton hands musician. It not only can be used to control the pitch the game， but also can reflect the deterrent referee， self-confidence. So how we can make good use of him? Summarized as follows:

First， the referee whistles selection
Whistler is one of the main signal basketball game， basketball referee whistles spot command of the game weapons. In order to meet the needs of intense competition， the referee must select a loud， pitch， high-frequency sound sharp whistle. Its whistle has four major advantages: First effort; blowing on it with a small and a great， high， sharp sound. Containing two good; this whistle mouth flat and long， capacity in the mouth. Three is nice; sonorous voice， although the frequency is high， but not harsh. Fourth， good-looking; generous and beautiful， and bright color and more.

Second， the whistle methods
To make the whistle blew louder， you must do the following:
(1) including whistle to be positive， put a whistle in the middle containing the upper and lower lips， otherwise， not good-looking， but also a bad blow.
(2) contain important post. In addition to the upper and lower lips tightly affixed to live， but also with the upper and lower teeth bite whistle.
(3) whistle， the first gas and ramped suck enough air， and then suddenly fast breathing， the only way to loud whistle.
   Referees' whistle blowing in some quite loud， gas shortage and blow not slow simmer， the amount of air flow through the whistle on the small and slow， the whistle had feebly， in addition， there is no time to have a good whistle， some referees coming to an end when the breath whistling， so it blew the whistle too loud.
Third， the whistle requirements
(1) Referee whistle when needed， no matter under what circumstances， only mono sound whistle， not more than the sound of whistle blowing， not kept whistle blowing， blowing sound may not be too long， too short， too light post.
(2) the whistle to be short and powerful， loud.
Fourth， the use whistles Attention
(1) when the jump ball， do drop the referee， do not whistle in the mouth and prevent injuries.
(2) at any time， live ball， whistle Always in your mouth， not in your hand， in order to avoid an urgent need to whistle， the surprise and affect the game.
(3) After the whistle for a foul， when the recording station near the sentencing procedure， should whistles spit， do not mouth whistle sentencing.
(4) The Referee， preferably with a spare whistle.
(5) prior to use whistles to check with the post to be cleaned and disinfected， and then packed in a clean box or bag whistle， do not lend to whistle， do not borrow someone else's whistle， which is the hygiene requirements.