Whistle: Difference between revisions

{{otheruses}}

[[Image:Pea Whistle.jpg|thumb|250px|A metal pea whistle.]]

Many types exist, from small [[police]] and [[sports]] whistles (also called [[pea whistles]]), to much larger [[train whistle]]s, which are [[steam whistle]]s specifically designed for use on [[locomotive]]s and [[ship]]s. Although whistles have a musical characteristic (for example train whistles sound a [[Minor_seventh_chord|minor-seventh musical chord]]) whistles are not usually considered 'musical' in the sense of being able to play a chosen melody, but mainly the small whistles can also be used as a - very shrill and loud - [[noise instrument|noise]] and [[rhythm instrument]]. However, musical whistles exist, including any of several 2-[[octave]] musical instruments known as [[tin whistle]]s (sometimes known as pennywhistles or low whistles), as well as the [[calliope (music)|calliope]] (an array of separately actuable steam whistles), [[Organ (music)|organ]] pipes and the [[recorder]].  Pea whistles are used in [[jazz]] and [[Latin music]] as a [[percussion instrument]].   

[[Train whistle]]s generally produce three or four different frequencies at the same time, to produce a non-[[major chord]], that is distinct, loud, and low in pitch.

Whistles are often used as warning devices or as safety devices serving to attract attention to the user. Some [[cyclist]]s use a whistle as a substitute for a [[bell (instrument) | bell]] or [[Horn (acoustic)|horn]]. It should be noted, however, that many jurisdictions require that the warning device be permanently attached to the [[bicycle]].

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