22 Northern and Downs(2002)建議兒童氣導(AC)在 500、1000、2000 Hz 三個頻率平均值應小於或等於
15 dB HL 才屬正常。下列敘述何者錯誤? (A) PTA AC = 30 dB HL,BC = 0 dB HL,SRT = 30 dB HL,鼓室圖:Type B,分類:輕度傳導性聽損 (B) PTA AC = 25 dB HL,BC = 25 dB HL,SRT = 25 dB HL,鼓室圖:Type A,分類:輕度感音性聽損 (C) PTA AC = 15 dB HL,BC = -10 dB HL,SRT = 10 dB HL,鼓室圖:Type As,分類:正常 (D) PTA AC = 15 dB HL,BC = 10 dB HL,SRT = 10 dB HL,鼓室圖:Type A,分類:正常