Fritze W
ENT Department, University of Vienna Medical School, Austria.
Acta Otolaryngol. 1995 May;115(3):359-62. doi: 10.3109/00016489509139329.
When the pressure in the external auditory canal is changed (as during tympanometry), the pitch rises by about 6 Hz on average (at +/- 400 mm H2O). Apparently, the travelling wave breaks earlier, as impedance increases, with the sound being projected to a site farther basal. At this site a vibration at the local resonant frequency is elicited. In keeping with the chaos theory, its amplitude is amplified by self-organisation. This is a purely mechanical process which does not involve perception in terms of neural stimulation. But through this mechanical pre-processing step the amplitude becomes high enough to be recognised as a signal by the outer hair cells.
当外耳道压力发生变化时（如在鼓室导抗测量期间），音调平均升高约6赫兹（在±400毫米水柱时）。显然，随着声阻抗增加，行波更早中断，声音被投射到更靠近基底的部位。在该部位会引发局部共振频率的振动。根据混沌理论，其振幅通过自组织得到放大。这是一个纯粹的机械过程，不涉及神经刺激方面的感知。但通过这个机械预处理步骤，振幅变得足够高，能够被外毛细胞识别为信号。
