瞬态诱发耳声发射的识别

Recognition of Transient Evoked Otoacoustic Emissions

目的为准确检测耳蜗功能，寻求在记录到的信号中正确识别瞬态诱发耳声发射（ＴＥＯＡＥ）信号的新方法。方法采用时－频域识别方法，根据ＴＥＯＡＥ与刺激伪迹不同的短时谱特征来有效识别两者。结果刺激伪迹的短时谱显示其在空气中以简单的指数规律快速衰减的特征。ＴＥＯＡＥ的短时谱显示其频率分布与刺激声基本一致，但各频率成分在潜伏期和转化过程上表现出多种模式。刺激伪迹和ＴＥＯＡＥ的短时谱有明显的区别。结论短时谱识别方法能有效地将ＴＥＯＡＥ与刺激伪迹区分开，可提高ＴＥＯＡＥ识别的准确性。

To measure the cochlear function more accurately, seeking for a novelmethod to recognize transient evoked otoacoustic emission (TEOAE) from the recorded signal. Methods Time-frequency domain method was used to effectively recognize TEOAEand stimulating artifact by their different short time Fourier transformation (STFT). Results The STFT of stimulating artifact features decayed rapidly in the air by exponentialrule. The frequency distribution of TEOAE was similar to that of the stimulating signal, butthe latency and shifting of TEOAE showed a complicated patern. The STFTs of stimulatingartifact and TEOAE varied significently. Conclusion STFT recognition method can separateTEOAE and stimulating artifact effectively so as to improve the accuracy of TEOAE recognition.