Shofner William P
Department of Speech and Hearing Sciences, Indiana University, 200 South Jordan Avenue, Bloomington, Indiana 47405, USA.
J Acoust Soc Am. 2015 Sep;138(3):1623-6. doi: 10.1121/1.4929746.
The ears of anurans are coupled through the Eustachian tubes and mouth cavity. The degree of coupling varies with frequency showing a bandpass characteristic, but the characteristics differ between empirically measured data based on auditory nerve responses and tympanic membrane vibration. In the present study, the coupling was modeled acoustically as a tube connected with a side branch. This tube corresponds to the Eustachian tubes, whereas the side branch corresponds to the mouth cavity and nares. The analysis accounts for the frequency dependency shown by the empirical data and reconciles the differences observed between the coupling as measured by tympanic membrane vibration and auditory nerve responses.
无尾两栖类动物的耳朵通过咽鼓管与口腔相连。耦合程度随频率变化呈现带通特性，但基于听觉神经反应的实测数据和鼓膜振动之间的特性有所不同。在本研究中，耦合在声学上被建模为一个连接有侧支的管道。该管道对应于咽鼓管，而侧支对应于口腔和鼻孔。该分析考虑了实测数据所示的频率依赖性，并调和了鼓膜振动测量的耦合与听觉神经反应之间观察到的差异。
