耳(er)內(nei)式(shi)(shi)(shi)助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)器(qi)(qi)(qi)(qi)（in-the-ear，ITE），也(ye)稱(cheng)為耳(er)甲(jia)腔(qiang)(qiang)式(shi)(shi)(shi)助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)器(qi)(qi)(qi)(qi)。耳(er)內(nei)式(shi)(shi)(shi)助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)器(qi)(qi)(qi)(qi)是(shi)(shi)最(zui)早開發應用(yong)的(de)(de)(de)(de)定制式(shi)(shi)(shi)助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)器(qi)(qi)(qi)(qi)。它占據耳(er)甲(jia)腔(qiang)(qiang)和耳(er)甲(jia)艇，從解剖(pou)學來講(jiang)，也(ye)叫耳(er)甲(jia)式(shi)(shi)(shi)助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)器(qi)(qi)(qi)(qi)。其外(wai)殼是(shi)(shi)根據聽(ting)(ting)障者的(de)(de)(de)(de)耳(er)甲(jia)腔(qiang)(qiang)形(xing)狀定制的(de)(de)(de)(de)，麥(mai)克(ke)風(feng)、放(fang)(fang)大器(qi)(qi)(qi)(qi)和耳(er)機全(quan)部(bu)放(fang)(fang)在(zai)定制的(de)(de)(de)(de)外(wai)殼內(nei)，外(wai)部(bu)不需要任(ren)何導(dao)線和軟(ruan)管，能全(quan)部(bu)放(fang)(fang)在(zai)耳(er)甲(jia)艇、耳(er)甲(jia)腔(qiang)(qiang)和外(wai)耳(er)道(dao)內(nei)，比較隱(yin)蔽輕便(bian)。此類助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)器(qi)(qi)(qi)(qi)的(de)(de)(de)(de)麥(mai)克(ke)風(feng)入口位(wei)于助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)器(qi)(qi)(qi)(qi)外(wai)側(ce)面(mian)，比起耳(er)背式(shi)(shi)(shi)助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)器(qi)(qi)(qi)(qi)更(geng)符合人耳(er)感受聲音的(de)(de)(de)(de)自(zi)然位(wei)置，耳(er)內(nei)式(shi)(shi)(shi)助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)器(qi)(qi)(qi)(qi)體積(ji)(ji)和面(mian)板面(mian)積(ji)(ji)相對(dui)較大，使雙麥(mai)克(ke)風(feng)技術較易得到應用(yong)。