How To Learn What Makes a Firework Whistle

Fireworks are always a treat for those within viewing site of the magnificent and mystical display they produce.  Technicians work hard to create all kinds of units, from small ground spinners and fountains to large displays with shell burst patterns and hummers.  One particular type of firework that will hold the crowd’s attention is a whistler.  Small whistles can be placed in petite fountains, shells, and rockets whereas it takes a much more complex method to make a larger firework whistle. 

Have you ever wondered how to make a firework whistle?  Many people believe the whistling sound is caused as a result of high-pressure gases building up inside of the firework’s base, so that when the firework is lit, it’s top forms an opening in which these gases slowly escape and high-pitched sound is released as the result.  While this line of thinking is on the right track, it is not exactly accurate. This information will explain how to explore the actual causes of what makes a firework whistle.

  1. First, whistling fireworks are almost always made from a solid bore tube which will act as a resonator.  The firework is quite narrow and has to be free from any air pockets that could cause the device to explode rather than perform properly.  The correct equipment also has to be used in order to succeed at creating the whistling effect.

    You will need either a hydraulic or arbor press along with tools that are especially designed for use in making whistling fireworks.

  2. The second step is to procure a whistling mix from a fuel and a catalyst.  There are a variety of fuels and catalysts that can be used in mixing.  For example, when choosing your fuel, you could choose between sodium salicylate, sodium benzoate, or potassium benzoate when a catalyst such as red iron oxide is used.  These substances are mixed in order to form the pyrotechnic composition needed to create and enhance the whistling sound within the firework.
  3. The next steps are to boil and press the mixture, a process than can take up to eight hours to complete.  Make sure to follow professional steps through this process as the mixture is highly explosive and dangerous to those not experienced with these chemicals.
  4. The final step is to fill the bore tube halfway up with the pyrotechnic composition. 

The result is a grand display of spark and sound that will delight the crowd.


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