Where does this come from, and can I check it?

Escaped steam vortexes inside spout caps to emit high-pitched acoustic whistles. The figure is taken from Encyclopaedia Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

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Whistling kettles sound alerts when steam expands through dual holes

Escaped steam vortexes inside spout caps to emit high-pitched acoustic whistles

Stovetop whistling kettles use a spout cap containing two parallel metal plates separated by a small expansion chamber. As water boils, forced steam passes through the first hole, vortexing inside the chamber and creating pressure waves that whistle loudly through the second aperture.

Collection of kettles — PMATAS · CC BY-SA 3.0 · licence · source

Where this comes from

Encyclopaedia Britannica

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Tags: kettles, sound, physics

Whistling kettles sound alerts when steam expands through dual holes: the short answers

Where does this come from, and can I check it?: Escaped steam vortexes inside spout caps to emit high-pitched acoustic whistles. The figure is taken from Encyclopaedia Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a everyday life fact?: Yes. It sits on the Everyday Life shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.