A.中重度B.輕度C.極重度D.全聾
A.反饋管理B.固定方向性C.自適應(yīng)噪聲抑制D.瞬噪抑制
A.線性助聽(tīng)器B.模擬助聽(tīng)器C.雙模擬線路助聽(tīng)器D.WDRC線路助聽(tīng)器