Two-tone distortion in intracochlear pressure
Two-tone distortion in intracochlear pressure
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DOI：
10.1121/1.1880812
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发表时间：
2005-05-01
影响因子：
2.4
通讯作者：
Olson, ES
中科院分区：
文献类型：
--
作者：
Dong, W;Olson, ES
在沙鼠耳蜗基部靠近感觉组织的耳蜗内压力中测量了双音失真，可以检测到柯蒂氏器的局部运动和力。测量探测产生双音失真的潜在非线性过程，以及失真产物的过滤和扩展。我们的一些发现如下：（1）观察结果与之前对 BM 运动中双音失真的观察结果一致 [J.神经生理学。 77、2385-2399（1997）； J.神经生理学。 78, 261-270 (1997)]。 (2) 频率扫描显示失真产物调谐和相位与频率的关系，与单音调谐相似但不相同。 (3) 畸变产物随距基底膜距离的衰减证实了它们可以通过直接流体路径驱动镫骨的可行性，如 Ren [Nat.神经科学。 7, 333-334 (2004)]。 (4)在某些情况下，当参考初级的相位时，单个族内的失真产物的相位(由单个初级对生成的失真产物的组)在0度和180度之间交替。这种行为是通过简单的压缩非线性来预测的。 (c) 2005 年美国声学学会。
Two-tone distortion was measured in the intracochlear pressure in the base of the gerbil cochlea, close to the sensory tissue, where the local motions and forces of the organ of Corti can be detected. The measurements probe both the underlying nonlinear process that generates two-tone distortion, and the filtering and spreading of the distortion products. Some of our findings are as follows: (1) The observations were consistent with previous observations of two-tone distortion in BM motion [J. Neurophysiol. 77, 2385-2399 (1997); J. Neurophysiol. 78, 261-270 (1997)]. (2) Frequency sweeps show distortion product tuning and phase-versus-frequency behavior that is similar, but not identical, to single tone tuning. (3) The decay of distortion products with distance from the basilar membrane confirms the feasibility that they could drive the stapes by a direct fluid route, as proposed by Ren [Nat. Neurosci. 7, 333-334 (2004)]. (4) The phases of the distortion products within a single family (the group of distortion products generated by a single primary pair) in some cases alternated between 0 degrees and 180 degrees when referenced to the phases of the primaries. This behavior is predicted by a simple compressive nonlinearity. (c) 2005 Acoustical Society of America.