Difference value between average threshold values of ASSR and pure tone threshold was about 3 to 10 dB HL,and it was 4.77 dB HL at(0.5 kHz),8.83 dB HL at 1.0 kHz,6.49 dB HL at 2.0 kHz,and 3.67 dB HL at 4.0 kHz.

• 0 kHz频区间分别为:4.；77、8