Relkin E M, Saunders J C
Acta Otolaryngol. 1980;90(1-2):6-15. doi: 10.3109/00016488009131692.
A capacitive probe was used to measure displacements of the umbo of the malleus in neonatal golden hamsters for discrete frequencies from 0.6 to 35.0 kHz. Displacement, extrapolated to a sound pressure of 100 dB SPL, plotted as a function of frequency demonstrated low-pass characteristics with a cutoff frequency near 9.0 kHz. The amplitude of displacement increased with age to a plateau at all frequencies. Analysis of the data below the cutoff frequency indicated that low frequency displacements were dominated by a compliance which increased with age. It was also found that high frequency responses showed evidence of increased mass limitation in younger as compared with older subjects. Comparisons between the inverse of velocity and evoked response threshold curves indicated that the middle ear plays an important role in determining thresholds throughout development.
使用电容式探头测量新生金黄地鼠在0.6至35.0千赫兹离散频率下锤骨柄的位移。将位移外推至100分贝声压级，绘制为频率的函数，显示出低通特性，截止频率接近9.0千赫兹。在所有频率下，位移幅度随年龄增长至平稳状态。对截止频率以下的数据进行分析表明，低频位移主要由顺应性主导，顺应性随年龄增长而增加。还发现与年长受试者相比，年轻受试者的高频反应显示出质量限制增加的迹象。速度倒数与诱发反应阈值曲线之间的比较表明，中耳在整个发育过程中对确定阈值起着重要作用。
