Vencovský Václav, Vetešník Aleš
Department of Radio Engineering, Czech Technical University in Prague, Technická 2, 166 27, Prague, Czech Republic.
Department of Nuclear Chemistry, Czech Technical University in Prague, Břehová 7, 115 19, Prague, Czech
JASA Express Lett. 2024 Sep 1;4(9). doi: 10.1121/10.0028386.
Input/output (I/O) functions of distortion-product otoacoustic emissions (DPOAEs) may contain sudden amplitude minima (notches) although they are measured in animals with a negligible reflection source. We measured DPOAEs in humans and analyzed the data by time-frequency filtering to decompose the nonlinear-distortion and coherent-reflection components of DPOAE. The presented I/O functions of the nonlinear-distortion component contain notches. We suggest that because these notches are present only in the nonlinear-distortion component, they result from destructive interference between distortion-product wavelets coming from the primary generation region. Simulations conducted with a nonlinear cochlear model showed qualitative similarities with the presented experimental results.
畸变产物耳声发射（DPOAE）的输入/输出（I/O）功能可能包含突然的幅度极小值（凹陷），尽管它们是在反射源可忽略不计的动物身上测量的。我们测量了人类的DPOAE，并通过时频滤波分析数据，以分解DPOAE的非线性失真和相干反射成分。所呈现的非线性失真成分的I/O功能包含凹陷。我们认为，由于这些凹陷仅出现在非线性失真成分中，它们是由来自初级产生区域的畸变产物小波之间的相消干涉导致的。用非线性耳蜗模型进行的模拟显示出与所呈现的实验结果在性质上的相似性。
