The predict mathematic model of the descent style group was 1/3(40HzAERP) +2/3ABR and the model of the ascent style group was 2/3(40HzAERP) +1/3ABR.

• 下降型,平均听阈=1/3(40HzAERP)+2/3ABR; 上升型,平均听阈=2/3(40HzAERP)+1/3ABR。