Dejonckere P, Lebacq J
Arch Int Physiol Biochim. 1980 Oct;88(4):333-41. doi: 10.3109/13813458009092903.
The phase relationship between subglottic pressure and vocal fold length has been studied during sustained phonation in five subjects with normal larynx. Pressure was measured by tracheal puncture and vocal fold length was deduced from simultaneous measurement of translaryngeal impedance in the horizontal plane and transglottal light flux in the vertical plane. The pressure sine wave shows a phase lead of slightly less than 90 degrees relative to the length sine wave. Thus during sustained phonation the vocal apparatus behaves like a harmonic oscillator; the frequency of oscillation is determined by the mechanical parameters of the vibrating system; the source of periodic energy supply is the subglottal pressure wave.
在五名喉部正常的受试者持续发声过程中，研究了声门下压力与声带长度之间的相位关系。通过气管穿刺测量压力，并根据同时测量的水平面经喉阻抗和垂直面经声门光通量推导声带长度。压力正弦波相对于长度正弦波显示出略小于90度的相位超前。因此，在持续发声过程中，发声器官的行为类似于一个谐波振荡器；振荡频率由振动系统的机械参数决定；周期性能量供应的来源是声门下压力波。
