A.使用距離; B.助聽(tīng)器是否能夠通過(guò)計(jì)算機(jī)軟件來(lái)編寫(xiě)程序; C.助聽(tīng)器信號(hào)處理方式; D.助聽(tīng)器傳聲器技術(shù); E.助聽(tīng)器放大線路。
A.小功率助聽(tīng)器,<104DBSPL B.中小功率助聽(tīng)器,104~115DBSPL C.中功率助聽(tīng)器,116~125DBSPL D.大功率助聽(tīng)器,126~135DBSPL E.特大功率助聽(tīng)器,≥135DBSPL
A.大于90DBHL B.81~90DBHL C.61~80DBHL D.41~60DBHL E.25~40DBHL