Huang G T, Rosowski J J, Flandermeyer D T, Lynch T J, Peake W T
Eaton-Peabody Laboratory of Auditory Physiology, Massachusetts Eye and Ear Infirmary, Boston 02114, USA.
J Acoust Soc Am. 1997 Mar;101(3):1532-49. doi: 10.1121/1.418107.
Acoustic and anatomical measurements were made on the middle ear of a deceased lion and compared with measurements from the domestic cat. The acoustic input impedance and sound-transmission ratios measured in the two species have similar features but differ quantitatively. Three-dimensional anatomical reconstructions show that the middle-ear structures of the lion and cat are similarly arranged but have large differences in absolute and relative size. In all fields, a bony septum divides the middle-ear air space into two cavities that are coupled through a small opening. A six-element analog-circuit model based on this distinctive structure captures the main features of both sets of middle-ear frequency responses, except at high frequencies. The element values are consistent with the structural dimensions of the cavities. The results suggest that quantitative measures of middle-ear cavity structure could allow prediction of frequency-dependent features of acoustic sensitivity for the entire cat family.
对一只已故狮子的中耳进行了声学和解剖学测量，并与家猫的测量结果进行了比较。在这两个物种中测量的声输入阻抗和声音传输比具有相似的特征，但在数量上有所不同。三维解剖重建表明，狮子和猫的中耳结构排列相似，但在绝对大小和相对大小上有很大差异。在所有区域，一个骨隔将中耳气腔分为两个通过一个小开口相连的腔室。基于这种独特结构的六元件模拟电路模型捕捉了两组中耳频率响应的主要特征，但在高频时除外。元件值与腔室的结构尺寸一致。结果表明，中耳腔结构的定量测量可以预测整个猫科动物声学敏感性的频率依赖性特征。
