Method:Fifteen of young men with normal hearing were exposed to 4 kHz short-term pure tone (Level ~ 130 dB SPL) for 3 minutes to analysis the change of DPOAE in details after Temporary Threshold Shift (TTS).

• 方法：用 130dB SPL的 4 kHz纯音对 15例听力正常人（30耳）进行 3 min的短时暴露，造成听力暂时性阈移后，用ILO－90耳声发射仪记录、分析暂时性阈移（TTS）时DPOAE的幅值、时间序列的特征，并与纯音暴露前进行对比。