選(xuan)配助(zhu)聽(ting)(ting)(ting)(ting)(ting)(ting)器(qi)(qi)(qi)時最好去醫院，對(dui)聽(ting)(ting)(ting)(ting)(ting)(ting)力做一次(ci)全面檢(jian)查，用電測聽(ting)(ting)(ting)(ting)(ting)(ting)等(deng)儀器(qi)(qi)(qi)準確地(di)評(ping)價(jia)出耳聾的程(cheng)度(du)，再(zai)選(xuan)助(zhu)聽(ting)(ting)(ting)(ting)(ting)(ting)器(qi)(qi)(qi)，如果當地(di)沒(mei)有相應條件的醫院，聽(ting)(ting)(ting)(ting)(ting)(ting)力損(sun)(sun)失(shi)程(cheng)度(du)與(yu)助(zhu)聽(ting)(ting)(ting)(ting)(ting)(ting)器(qi)(qi)(qi)功率(lv)(lv)(lv)的選(xuan)配可(ke)按口(kou)語試驗來估計。例如，聽(ting)(ting)(ting)(ting)(ting)(ting)不(bu)到(dao)(dao)(dao)耳語聲(sheng)(sheng)(sheng)的人(ren)聽(ting)(ting)(ting)(ting)(ting)(ting)力損(sun)(sun)失(shi)30～40分(fen)貝(bei)(bei)(bei)，聽(ting)(ting)(ting)(ting)(ting)(ting)不(bu)到(dao)(dao)(dao)低小(xiao)聲(sheng)(sheng)(sheng)的人(ren)聽(ting)(ting)(ting)(ting)(ting)(ting)力損(sun)(sun)失(shi)約40～50分(fen)貝(bei)(bei)(bei)，此時宜(yi)選(xuan)購低功率(lv)(lv)(lv)及(ji)中功率(lv)(lv)(lv)助(zhu)聽(ting)(ting)(ting)(ting)(ting)(ting)器(qi)(qi)(qi)；聽(ting)(ting)(ting)(ting)(ting)(ting)不(bu)到(dao)(dao)(dao)普通講話(hua)聲(sheng)(sheng)(sheng)的人(ren)聽(ting)(ting)(ting)(ting)(ting)(ting)力損(sun)(sun)失(shi)約50～60分(fen)貝(bei)(bei)(bei)，聽(ting)(ting)(ting)(ting)(ting)(ting)不(bu)到(dao)(dao)(dao)高聲(sheng)(sheng)(sheng)講話(hua)的人(ren)聽(ting)(ting)(ting)(ting)(ting)(ting)力損(sun)(sun)失(shi)60～70分(fen)貝(bei)(bei)(bei)，可(ke)選(xuan)配中功率(lv)(lv)(lv)及(ji)大功率(lv)(lv)(lv)型助(zhu)聽(ting)(ting)(ting)(ting)(ting)(ting)器(qi)(qi)(qi)；聽(ting)(ting)(ting)(ting)(ting)(ting)不(bu)到(dao)(dao)(dao)大聲(sheng)(sheng)(sheng)喊叫(jiao)聲(sheng)(sheng)(sheng)的人(ren)，聽(ting)(ting)(ting)(ting)(ting)(ting)力損(sun)(sun)失(shi)70～80分(fen)貝(bei)(bei)(bei)，選(xuan)用中、大功率(lv)(lv)(lv)助(zhu)聽(ting)(ting)(ting)(ting)(ting)(ting)器(qi)(qi)(qi)；全力喊叫(jiao)聲(sheng)(sheng)(sheng)聽(ting)(ting)(ting)(ting)(ting)(ting)不(bu)到(dao)(dao)(dao)的人(ren)聽(ting)(ting)(ting)(ting)(ting)(ting)力損(sun)(sun)失(shi)約約80～90分(fen)貝(bei)(bei)(bei)或更高，可(ke)選(xuan)配大功率(lv)(lv)(lv)及(ji)特大功率(lv)(lv)(lv)助(zhu)聽(ting)(ting)(ting)(ting)(ting)(ting)器(qi)(qi)(qi)。