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July 26, 2026Sources cited
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Whistle

A whistle is a device or sound used to produce a loud, high-pitched tone, usually by forcing air or steam through a small opening.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

A whistle is a device or sound used to produce a loud, high-pitched tone, usually by forcing air or steam through a small opening. The term also refers to the act of making such a sound with the lips or teeth, and more broadly to similar high-pitched sounds in nature or machinery.

Definition

A whistle is a sound-producing device or the sound it makes. In common usage, it also refers to the act of making a similar shrill sound with the lips or teeth.

Construction and sound production

Whistles work by forcing air, steam, or another gas through a narrow opening or against an edge, creating a high-pitched tone. Mouth whistles use the shape of the lips, tongue, and mouth cavity to generate the sound.

Uses

Whistles are widely used for signaling and calling attention. Common examples include referee whistles, safety whistles, and signalling devices in industrial or public settings.

Musical and cultural use

In music, whistles are simple wind instruments and may appear in folk and contemporary performance. The term also appears in idioms, slang, and descriptions of bird or mechanical sounds.

Key facts

  • A whistle is a device that makes a loud, high-pitched sound when air or steam is forced through it.
  • Whistling is the act of making a similar sound with the mouth, while a whistle is the device or the sound it produces.
  • Whistles are commonly used for signaling, attracting attention, and officiating sports.
  • In musical contexts, a whistle is a simple wind instrument and is often treated as a type of flute.
  • The term can also refer to similar high-pitched sounds made by birds, wind, steam, or moving objects.
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Canadian context

Whistles are commonly used in Canadian sports, emergency preparedness, outdoor recreation, and school or workplace safety settings.

Frequently asked questions

What is a whistle?
A whistle is a device that makes a loud, high-pitched sound when air or steam is forced through it.
Is whistling the same as a whistle?
No. Whistling is the act of making a similar sound with the mouth, while a whistle is the device or the sound it produces.
What are whistles used for?
They are commonly used for signaling, attracting attention, and officiating sports.
Is a whistle a musical instrument?
Yes. In musical contexts, a whistle is a simple wind instrument and is often treated as a type of flute.
Can whistle refer to other sounds?
Yes. It can also mean a similar high-pitched sound made by birds, wind, steam, or moving objects.

References

  1. Encyclopedia.com — https://www.encyclopedia.com/literature-and-arts/performing-arts/music-history/whistle
    Supports: General definition of whistle as a sound-producing device and related noun/verb senses.
  2. Britannica — https://www.britannica.com/art/whistle
    Supports: Whistle as a short flute, sound production mechanism, and historical/musical context.
  3. Cambridge Dictionary — https://dictionary.cambridge.org/us/dictionary/english/whistle
    Supports: Definitions for the device, the sound, and the verb meaning related to making a high sound or referee signalling.
  4. Merriam-Webster — https://www.merriam-webster.com/dictionary/whistles
    Supports: Multiple noun and verb senses including the device, sound, and signalling use.