Methods 30 healthy youth (60 ears) were detected for DPOAE using OAE apparatus of CAPELLA type. L 1 =70 dB SPL,L 2 =60 dB SPL were selected as initial intensities. The level difference was 10dB SPL.

• 方法对 30例 (6 0耳 )听力正常青年人 ,用CAPELLA机型耳声发射仪进行DPOAE测试 ,选择初始音强度L1 =70dBSPL ,L2 =6 0dBSPL ,水平差 10dBSPL。