耳(er)內(nei)式(shi)(shi)(shi)助(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)(qi)(qi)（in-the-ear，ITE），也稱為(wei)耳(er)甲(jia)(jia)腔(qiang)式(shi)(shi)(shi)助(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)(qi)(qi)。耳(er)內(nei)式(shi)(shi)(shi)助(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)(qi)(qi)是(shi)最早(zao)開發應(ying)用(yong)的定制(zhi)式(shi)(shi)(shi)助(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)(qi)(qi)。它占據耳(er)甲(jia)(jia)腔(qiang)和耳(er)甲(jia)(jia)艇(ting)，從解剖(pou)學來講，也叫(jiao)耳(er)甲(jia)(jia)式(shi)(shi)(shi)助(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)(qi)(qi)。其外殼是(shi)根(gen)據聽(ting)(ting)(ting)障者(zhe)的耳(er)甲(jia)(jia)腔(qiang)形狀定制(zhi)的，麥克風(feng)、放(fang)大器(qi)(qi)(qi)(qi)(qi)和耳(er)機全部(bu)放(fang)在(zai)(zai)定制(zhi)的外殼內(nei)，外部(bu)不需要(yao)任何導線(xian)和軟管，能全部(bu)放(fang)在(zai)(zai)耳(er)甲(jia)(jia)艇(ting)、耳(er)甲(jia)(jia)腔(qiang)和外耳(er)道內(nei)，比(bi)較(jiao)隱蔽輕便。此(ci)類助(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)(qi)(qi)的麥克風(feng)入口位(wei)于助(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)(qi)(qi)外側面，比(bi)起耳(er)背(bei)式(shi)(shi)(shi)助(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)(qi)(qi)更(geng)符合人耳(er)感受聲音的自然位(wei)置(zhi)，耳(er)內(nei)式(shi)(shi)(shi)助(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)(qi)(qi)體積(ji)和面板面積(ji)相對較(jiao)大，使雙(shuang)麥克風(feng)技術較(jiao)易得(de)到應(ying)用(yong)。