Average values were calculated for peak latency (PL), interpeak latency (IPL), interaural latency difference (ILD), amplitude (Amp), and the ratio of amplitude of peak V and amplitude of peak I (AmpV/ 1).

• 分别记录每耳1、ill、V波的潜伏期、波间潜伏期、耳间潜伏期差、振幅（amplitude，Amp）及1、V波的振幅之比（AmpV/I）。