耳(er)(er)內(nei)式(shi)助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)(qi)（in-the-ear，ITE），也稱為耳(er)(er)甲腔(qiang)式(shi)助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)(qi)。耳(er)(er)內(nei)式(shi)助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)(qi)是(shi)最早開發應用的(de)(de)定(ding)制(zhi)(zhi)式(shi)助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)(qi)。它(ta)占據耳(er)(er)甲腔(qiang)和耳(er)(er)甲艇，從解剖學來(lai)講，也叫耳(er)(er)甲式(shi)助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)(qi)。其外(wai)(wai)殼是(shi)根(gen)據聽(ting)(ting)(ting)(ting)障者的(de)(de)耳(er)(er)甲腔(qiang)形(xing)狀定(ding)制(zhi)(zhi)的(de)(de)，麥克風(feng)、放(fang)(fang)(fang)大器(qi)(qi)(qi)(qi)和耳(er)(er)機全部(bu)放(fang)(fang)(fang)在定(ding)制(zhi)(zhi)的(de)(de)外(wai)(wai)殼內(nei)，外(wai)(wai)部(bu)不需要任(ren)何導線和軟管，能(neng)全部(bu)放(fang)(fang)(fang)在耳(er)(er)甲艇、耳(er)(er)甲腔(qiang)和外(wai)(wai)耳(er)(er)道內(nei)，比較隱蔽輕便。此類助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)(qi)的(de)(de)麥克風(feng)入口位于助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)(qi)外(wai)(wai)側面，比起耳(er)(er)背(bei)式(shi)助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)(qi)更(geng)符(fu)合人耳(er)(er)感受聲音的(de)(de)自然(ran)位置，耳(er)(er)內(nei)式(shi)助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)(qi)體積和面板(ban)面積相對較大，使雙麥克風(feng)技術較易得(de)到應用。