How to Test Out Air Horns

Air horns emit a high-pitched squeal that is recognizable to almost anyone who has attended a live sporting event. Air horns keep air compressed at a very high rate, and when the button is depressed, the air is routed out of a horn that is shaped to amplify the sound. All air horns are not the same. Some models are louder and create a more distinct sound than others. Testing an air horn requires some simple equipment.

Things You'll Need

  • Sound level meter
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Instructions

    • 1

      Activate the air horn in the presence of a sound level meter (SLM). The SLM will measure the air horn's decibel level, which is a gauge of the overall pressure created by the sound waves from the horn as they travel through the air. A higher reading means it is an overall louder sound. A level of 50dB is a typical reading for a loud conversation while 100dB is the equivalent of a jackhammer at close range and will cause hearing damage after 15 minutes of exposure. Some air horns generate sound in the 120dB range.

    • 2

      Have an assistant walk 10 meters away and record another decibel reading while you activate the air horn. Conduct another reading from 100 meters away. The multiple tests also verify the air horn will not malfunction after one or two uses.

    • 3

      Repeat the tests with other air horns, and pick the one with either the highest or the lowest reading, depending on what you intend to use the air horn for.