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A whistle (or call) is a simple aerophone, an instrument which produces sound from a stream of forced air. It may be mouth-operated, or powered by air pressure, steam, or other means. Whistles vary in size from a small slide whistle or nose flute type to a large multi-piped church organ.

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This is a redirect from a modification of the target's title; for example, its words are rearranged, or punctuation in the name is changed. In cases of modification from distinctly longer or shorter names, please use {{R from full name}} or {{R from incomplete name}}. Use this rcat instead of {{R from other capitalisation}} and {{R from plural}} in namespaces other than mainspace for those types of modification. For more information follow the category link.

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