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A party whistle A metal pea whistle. A whistle is a musical instrument which produces sound from a stream of gas, most commonly 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.
A pea whistle is constructionally identical to a "police whistle", but the chamber contains a small ball, known as the pea, but usually a material such as plastic or hard rubber. When blown, the pea moves chaotically in the chamber, interrupting and modulating the airflow to create a typical warbling/shrieking effect.
Joseph Hudson (1848–1930) was an inventor in Birmingham, England during the late 19th century and the founder of J Hudson & Co in 1870, later to become the world largest whistle manufacturer . Hudson entered a competition held by the Metropolitan police force in London in 1883 to design a better way of attracting people's attention.
An offstage whistle audible to the audience in the middle of a performance might also be considered bad luck. Transcendental whistling ( chángxiào 長嘯) was an ancient Chinese Daoist technique of resounding breath yoga, and skillful whistlers supposedly could summon supernatural beings, wild animals, and weather phenomena.
Their Tornado 2000 whistle is capable of easily reaching 122 decibels. J Hudson & Co was founded in the 1870s in Birmingham by Joseph Hudson (1848–1930) and his brother James Hudson (1850–1889). The company became a manufacturer of whistles and continues as Acme Whistles .
Whistle (company), a subsidiary of Mars Petcare; Whistle (organisation), a West Ham United F.C. supporters' pressure group; Whistle (superhero), a fictional DC Comics character; Whistled language; Whistle Orange Soda, a soft drink made by Vess; A unit of time used in Indian cooking; Whistle, or whistle and flute, rhyming slang for suit
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The pea in a pea whistle isn't part of the sound generation mechanism in the way a woodwind's reed is. In pea whistles the moving pea changes the shape of the resonant chamber, and that causes the characteristic warbling of the sound, but the pea has nothing to do with the generation of the sound.