Relkin E M, Saunders J C, Konkle D F
J Acoust Soc Am. 1979 Jul;66(1):133-9. doi: 10.1121/1.383066.
A high-frequency admittance meter was developed and used to study the maturation of physiological function in the middle ear of neonatal golden hamsters (Mesocricetus auratus). The middle-ear input admittance in the frequency range of 0.8-1.8 kHz was measured in animals ranging in age from 6 to 69 days postpartum. Admittance magnitude was found to increase steadily with age, beginning on day 16, to asymptotic values at each test frequency. There were no obvious differences in admittance growth rates within the range of frequencies tested. However, an analysis of the slopes of the admittance ma;nitude frequency response curves revealed an increase from 4.6 dB/octave for animals 25 days old or younger, to 6.3 dB/octave for all older animals. This difference between younger and older subjects indicates that the development of the middle ear in the golden hamster is more complex than a simple increase in pure compliance.
研制了一种高频导纳仪，并用于研究新生金黄地鼠（Mesocricetus auratus）中耳生理功能的成熟情况。在产后6至69日龄的动物中，测量了0.8 - 1.8 kHz频率范围内的中耳输入导纳。发现导纳幅值从产后第16天开始随年龄稳步增加，在每个测试频率下达到渐近值。在所测试的频率范围内，导纳增长率没有明显差异。然而，对导纳幅值频率响应曲线斜率的分析表明，25日龄及以下动物的斜率为4.6 dB/倍频程，而所有年龄较大动物的斜率为6.3 dB/倍频程。年轻和年长受试者之间的这种差异表明，金黄地鼠中耳的发育比单纯的纯顺应性增加更为复杂。
