• First of all, ensure that you have a good quality whistle. Most soccer referees now use a ‘pealess’ whistle, such as the Fox 40 or Acme Tornado. These whistles are available at most sporting goods stores that sell soccer equipment, or are available online.
• Next, understand that there is a technique to making any whistle sound good. The force has to come from your ‘gut’ or diaphragm, not your cheeks. There is a good tutorial from Fox 40 – here.
• Lastly, find somewhere that you can practice your whistle. A local soccer field may be best, as neighbours etc. are used to hearing whistles – as long as it is done during daytime or early evening hours.
• A whistle blown with confidence and authority will often produce less complaints about your calls, as it sends a message that you know what you are doing. A ‘weak’ whistle may suggest that you are a ‘weak’ referee, and invite disagreement and dissent.

Happy Whistling!