Experimental confirmation of the two-source interference model for the fine structure of distortion product otoacoustic emissions
Experimental confirmation of the two-source interference model for the fine structure of distortion product otoacoustic emissions
复制标题
DOI：
10.1121/1.424584
复制
发表时间：
1999-01-01
影响因子：
2.4
通讯作者：
Dhar, S
中科院分区：
文献类型：
--
作者：
Talmadge, CL;Long, GR;Dhar, S
高分辨率的测量失真产物耳声发射（DPOAE）从三个不同的实验范例被证明是在一个现实的“双源”耳蜗模型的DPOAE精细结构的影响。DPOAE振幅和相位的测量结果表明，在一次波强非线性相互作用区（强重叠区）存在一个声源，另一个声源位于DPOAE音调位置附近的干涉现象。来自DPOAE位置的分量可以大于来自发生器区域的分量。这些研究结果支持的发病和偏移的DPOAE时，较高频率的初级脉冲和关闭的分析。通过添加频率更接近DPOAE的第三个音来进一步测试双源假设，该第三个音修改了来自DPOAE位置的分量的幅度，并且使来自发生器区域的分量保持不变。结果与模型预测一致，即DPOAE音调位置分量的相位随频率的变化和隐含潜伏期大于产生区域分量的相应量。(C)1999年美国声学学会。[S0001-4966（99）01101-7]。
High-resolution measurements of distortion product otoacoustic emissions (DPOAEs) from three different experimental paradigms are shown to be in agreement with the implications of a realistic "two-source" cochlear model of DPOAE fine structure. The measurements of DPOAE amplitude and phase imply an interference phenomenon involving one source in the region of strong nonlinear interaction of the primary waves (the strong ''overlap'' or generation region), and the other source region around the DPOAE tonotopic place. The component from the DPOAE place can be larger than the one from the generator region. These findings are supported by the analysis of the onset and offset of the DPOAE when the higher-frequency primary is pulsed on and off. The two-source hypothesis was further tested by adding a third tone closer in frequency to the DPOAE which modifies the amplitude of the component from the DPOAE place and leaves the one from the generator region unchanged. The results agree well with the model prediction that the variation with frequency, and implied latency, of the phase of the DPOAE tonotopic-place component are greater than the corresponding quantities for the component from the generation region. (C) 1999 Acoustical Society of America. [S0001-4966(99)01101-7].