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The whistle register (also called the flageolet or flute register or whistle tone) is the highest register of the human voice, lying above the modal register and falsetto register. This register has a specific physiological production that is different from the other registers, and is so called because the timbre of the notes that are produced from this register are similar to that of a whistle. In some sopranos, the modal register vocal production may extend into what is usually thought of as the whistle register. With proper vocal training, it is possible for women within all voice types to develop this part of the voice. However, some women are unable to phonate or comfortably produce sound in this register. Children can also phonate in the whistle register and rarely, some men.〔 ==Physiology and definition== The whistle register is the highest phonational register, that in most singers begins above the soprano "high C" (C6 or 1,046.5 Hz) and usually extends to about two Ds above (D7 or 2349.3 Hz). The lower part of the whistle register may overlap the upper parts of the modal and falsetto registers, making it possible for singers to phonate these notes in different ways. However, fundamentally the whistle register is most commonly used to produce pitches above C6. As with the other vocal registers, the whistle register does not begin at the same point within every voice, and there are rare voices which can extend the whistle register much higher or lower than the range listed above. For example, most operatic sopranos can sing up to the "high" F above "high" C without entering into the whistle register.〔 Mado Robin is one example of a soprano who often sings F above "high" C (F6) to B above "high" C (B6) without entering into the whistle register. The physiology of the whistle register is the least understood of the vocal registers. Unlike other types of vocal production, it is difficult to film the vocal cords while they are operating in this manner as the epiglottis closes down over the larynx and the resonating chamber assumes its smallest dimensions. It is known that when producing pitches in this register, vibration occurs only in some anterior portion of the vocal folds. This shorter vibrating length naturally allows for easier production of high pitches. Although the whole physiological production of whistle tone is not understood, it is known that when the laterals are active but the transversus inactive, a triangular opening is seen between the arytenoids, the vocal processes contact each other, but the posterior parts at the apex do not contact each other. The exception to this would be if the vocal folds are not stretched, as stretching of the vocal ligaments abducts (moves away from) the vocal processes. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Whistle register」の詳細全文を読む スポンサード リンク
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