Zheng L, Zhang Y T, Yang F S, Ye D T
Department of Electrical Engineering, Tsinghua University, Beijing, China.
IEEE Trans Biomed Eng. 1999 Sep;46(9):1098-106. doi: 10.1109/10.784141.
In this paper, transient-evoked otoacoustic emissions (TEOAE's) are synthesized by an active auditory model, and decomposed by continuous wavelet transform (CWT) to study the frequency-latency relationship and the generation of TEOAE signals. The controlled voltage sources that relate to the mobile mechanism of the outer hair cells (OHC's) are proposed to serve as the generation sources of TEOAE signals. The state-variable method is adopted to calculate the auditory model. The mother wavelet used in CWT is selected on basis of the model. The results of this study show that the simulated TEOAE signal is similar to the clinically detected ones not only in the time-domain waveform, but also in the frequency-latency relationship. It seems to be clear that the generation of TEOAE signals is related to the same active mechanism as the cochlear sharp frequency selectivity.
本文中，瞬态诱发耳声发射（TEOAE）由主动听觉模型合成，并通过连续小波变换（CWT）进行分解，以研究频率-潜伏期关系及TEOAE信号的产生机制。提出与外毛细胞（OHC）运动机制相关的受控电压源作为TEOAE信号的产生源。采用状态变量法计算听觉模型。基于该模型选择CWT中使用的母小波。本研究结果表明，模拟的TEOAE信号不仅在时域波形上，而且在频率-潜伏期关系上均与临床检测的信号相似。很明显，TEOAE信号的产生与耳蜗尖锐频率选择性的相同主动机制有关。
