Living · 6 pages · 12 min
How a kettle whistles
Steam forced through a small cap vibrates the air into a tone.
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From the opening
A kettle whistles because boiling pushes a jet of steam through a small opening built to make a tone. The sound is that jet oscillating in the whistle, not the body of the kettle singing by itself. The opening covers a steam jet through holes, resonance, then a vortex tone, and a clicking kettle is a switch.
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Inside
- A steam jet through holes
- Resonance, then a vortex tone
- A clicking kettle is a switch
- Louder means more steam
- Where the idea stops applying
- A distinction worth keeping
Sources
- Hole-tone whistling from a steam jet
- Helmholtz resonance in a kettle whistle