Department of Radioelectronics, Czech Technical University in Prague, Technická 2, 166 27 Prague, Czech
Department of Nuclear Chemistry, Czech Technical University in Prague, Břehová 7, 115 19 Prague, Czech
J Acoust Soc Am. 2019 Aug;146(2):EL92. doi: 10.1121/1.5119942.
The amplitudes of distortion-product otoacoustic emissions (DPOAEs) may abruptly decrease even though the stimulus level is relatively high. These notches observed in the DPOAE input/output functions or distortion-product grams have been hypothesized to be due to destructive interference between wavelets generated by distributed sources of the nonlinear-distortion component of DPOAEs. In this paper, simulations with a smooth cochlear model and its analytical solution support the hypothesis that destructive interference between individual wavelets may lead to the amplitude notches and explain the cause for onset and offset amplitude overshoots in the DPOAE signal measured for intensity pairs in the notches.
畸变产物耳声发射（DPOAE）的幅度可能会突然降低，即使刺激水平相对较高。在 DPOAE 的输入/输出函数或失真产物克中观察到的这些凹陷，据推测是由于 DPOAE 的非线性失真分量的分布式源产生的波之间的相消干涉。在本文中，使用平滑耳蜗模型及其解析解的模拟支持了这样一种假设，即个体波之间的相消干涉可能导致幅度凹陷，并解释了在凹陷处测量的强度对中 DPOAE 信号的起始和结束幅度过冲的原因。
