Whistle: Difference between revisions
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Many types exist, from small [[police]] and [[sports]] whistles (also called [[pea whistles]]), to much larger steam whistles used on [[locomotive]]s and [[ship]]s. They are not usually considered 'musical' as such, but musical versions that work on the same principle exist, including any of several 2-[[octave]] musical instruments known as [[tin whistle]]s (sometimes known as pennywhistles or low whistles), [[Organ (music)|organ]] pipes and the [[recorder]]. Pea whistles are used in [[jazz]] and [[Latin music]] as combination [[reed instrument|reed]] and [[percussion]] [[instrument]]. | Many types exist, from small [[police]] and [[sports]] whistles (also called [[pea whistles]]), to much larger steam whistles used on [[locomotive]]s and [[ship]]s. They are not usually considered 'musical' as such, but musical versions that work on the same principle exist, including any of several 2-[[octave]] musical instruments known as [[tin whistle]]s (sometimes known as pennywhistles or low whistles), [[Organ (music)|organ]] pipes and the [[recorder]]. Pea whistles are used in [[jazz]] and [[Latin music]] as combination [[reed instrument|reed]] and [[percussion]] [[instrument]]. | ||
The whistle works by causing the smooth flow of air to be split by a narrow blade, sometimes called a [[fipple]], creating a [[turbulence|turbulent]] [[vortex]] which causes the air to vibrate. By attaching a [[resonance|resonant]] chamber to the basic whistle, it may be tuned to a particular note and made louder. The length of the chamber typically defines the resonant [[frequency]]. A whistle may also contain a small light ball, usually called the ''[[pea]]'', which rattles around inside, creating a [[chaos|chaotic]] [[vibrato]] effect that intensifies the sound. [[Japanese]] [[bird whistles]] use several small balls and are half filled with water in order to reproduce the sound of a [[bird song]]. | The whistle works by causing the smooth flow of air to be split by a narrow blade, sometimes called a [[fipple]], creating a [[turbulence|turbulent]] [[vortex]] which causes the air to vibrate. By attaching a [[resonance|resonant]] chamber to the basic whistle, it may be tuned to a particular note and made louder. The length of the chamber typically defines the resonant [[frequency]]. A whistle may also contain a small light ball, usually called the ''[[pea]]'', which rattles around inside, creating a [[chaos|chaotic]] [[vibrato]] effect that intensifies the sound. [[Japanese people|Japanese]] [[bird whistles]] use several small balls and are half filled with water in order to reproduce the sound of a [[bird song]]. | ||
A steam whistle works the same way, but using steam as a source of pressure: such whistles may produce extremely high sound intensities and may cause a bleeding of the ears. | A steam whistle works the same way, but using steam as a source of pressure: such whistles may produce extremely high sound intensities and may cause a bleeding of the ears. | ||