A whistle (or call) is a simple aerophone, an instrument which produces sound from a stream of forced air. It may be mou
Read moreA 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.
