Bozeman Kenneth Wood
Lawrence University, Conservatory of Music , 711 E. Boldt Way, Appleton, Wisconsin 54911 , USA.
Logoped Phoniatr Vocol. 2013 Jul;38(2):64-9. doi: 10.3109/14015439.2012.679967. Epub 2012 Apr 19.
Awareness of interactions between the lower harmonics of the voice source and the first formant of the vocal tract, and of the passive vowel modifications that accompany them, can assist in working out a smooth transition through the passaggio of the male voice. A stable vocal tract length establishes the general location of all formants, including the higher formants that form the singer's formant cluster. Untrained males instinctively shorten the tube to preserve the strong F1/H2 acoustic coupling of voce aperta, resulting in 'yell' timbre. If tube length and shape are kept stable during pitch ascent, the yell can be avoided by allowing the second harmonic to rise above the first formant, creating the balanced timbre of voce chiusa.
了解声源的低次谐波与声道第一共振峰之间的相互作用，以及与之相伴的被动元音变化，有助于找出男性嗓音换声区的平稳过渡方式。稳定的声道长度确定了所有共振峰的大致位置，包括构成歌手共振峰簇的高次共振峰。未经训练的男性会本能地缩短声道，以保持开声时较强的F1/H2声学耦合，从而产生“喊叫”音色。如果在音高上升过程中保持声道长度和形状稳定，通过让二次谐波高于第一共振峰，就可以避免喊叫音色，从而产生闭声的平衡音色。
