Distortion‐product otoacoustic emissions in the bobtail lizard. I: General characteristics
Distortion‐product otoacoustic emissions in the bobtail lizard. I: General characteristics
复制标题
短尾蜥蜴的失真产物耳声发射 I：一般特征。
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
B. M. Johnstone
中科院分区：
文献类型：
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作者：
G. Manley;C. Köppl;B. M. Johnstone
在短尾蜥蜴的耳道中，测量了发出的谐波和失真产物(DP)，其中一些对低氧敏感。产生DP的最低基音水平与该蜥蜴的最佳听神经纤维阈值密切相关。起源于基底乳头两段的DP(对不同的频率范围作出反应)在许多方面不同。来自高频段的DP在许多细节上与哺乳动物的声波DP有显著的相似之处，尽管这些听力器官在结构和微观机械上存在很大的差异，这表明毛细胞本身的特征是决定DP产生的最重要的因素。此外，DP显然起源于这种蜥蜴乳头的高频区，在那里，单神经纤维不会表现出双音率抑制，这是另一种非线性现象。在某些情况下，DP水平明显受到压力的影响。
In the ear canal of the bobtail lizard, both emitted harmonics and distortion products (DP) were measured, some of which were sensitive to hypoxia. The minimal levels of primary tones for the production of DP corresponded closely to the best auditory‐nerve fiber thresholds for this lizard species. DP originating from the two segments of the basilar papilla (which respond to different frequency ranges) differed in a number of respects. DP from the higher‐frequency segment bore a remarkable resemblance to the acoustic DP of mammals in many details, in spite of substantial structural and micromechanical differences between these hearing organs, suggesting that it is the characteristics of the hair cells themselves that are the most important factors determining DP generation. Also, DP clearly originated in the high‐frequency region of this lizard papilla, where single‐nerve fibers do not show two‐tone rate suppression, another nonlinear phenomenon. In some cases, the DP level was clearly affected by the pres...