How does a kettle whistle?
The aeroacoustics of a steam kettle
Cambridge engineers finally explained how a whistling kettle whistles.
The team built a model kettle whistle, blew air through it at different speeds, and compared the sounds with their computer models.
At low flow the whistle sings like blowing over a bottle, and at higher flow, little swirls of steam take over and produce the familiar shriek. Tea time, now with acoustic engineering.
Your kettle is a tiny wind instrument with one song.