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A whistle is an 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.

Whistles have been around since early humans first carved out a gourd or branch and found they could make sound with it. In prehistoric Egypt, small shells were used as whistles.[1] Many present day wind instruments are inheritors of these early whistles. With the rise of more mechanical power, other forms of whistles have been developed.[2]

One characteristic of a whistle is that it creates a pure, or nearly pure, tone. The conversion of flow energy to sound comes from an interaction between a solid material and a fluid stream. The forces in some whistles are sufficient to set the solid material in motion. Classic examples are Aeolian tones that result in galloping power lines, or the Tacoma Narrows Bridge (the so-called "Galloping Gertie" of popular media). Other examples are circular disks set into vibration.[3]

In 1883, he began experimenting with pea-whistle designs that could produce an intense sound that could grab attention from over a mile away. His invention was discovered by accident when he dropped his violin and it shattered on the floor. Observing how the discordant sound of the breaking strings travelled (trill effect), Hudson had the idea to put a pea in the whistle.[6] Prior to this, whistles were much quieter and were only thought of as musical instruments or toys for children. After observing the problems that local police were having with effectively communicating with rattles,[7][8] he realised that his whistle designs could be used as an effective aid to their work.[6][9]

Hudson demonstrated his whistle to Scotland Yard and was awarded his first contract in 1884. Both rattles and whistles were used to call for back-up in areas where neighbourhood beats overlapped, and following their success in the Metropolitan Police of London, the whistle was adopted by most police forces in the United Kingdom.[6]

During World War I, officers of the British Army and United States Army used whistles to communicate with troops, command charges and warn when artillery pieces where going to fire.[10][11] Most whistles used by the British were manufactured by J & Hudson Co.[10]

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When compulsory education forces the majority of our children into schools run by activists who view themselves as surrogate parents, and who hold to views directly opposed to the majority of the actual parents, the whistle must be blown louder than for any other cause.

Where it all started the World's first sports whistle, used by every generation since 1884 and still appearing in World sport finals every year. The contemporary ACME Thunderer sports whistle is available in 8 different versions for every sport and every use. Totally consistent and reliable all-weather whistles.

There are currently eight different types of ACME Thunderer that make up the range. The main difference between the models is the overall size of the whistle or the width and length of the mouthpiece; by varying the size of the whistle and mouthpiece it is possible to achieve different sounds, tones and volumes. Generally, a larger whistle will have a louder and deeper sound than a smaller whistle, and by elongating and flaring the mouthpiece of some models, a very loud and high pitched sound can be created, whereas by tapering the mouthpiece, a deeper sound can be achieved. 59ce067264



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