耳內(nei)(nei)(nei)式助(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)（in-the-ear，ITE），也稱為(wei)耳甲(jia)腔式助(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)。耳內(nei)(nei)(nei)式助(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)是(shi)最早開(kai)發(fa)應用的定(ding)制(zhi)式助(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)。它(ta)占據耳甲(jia)腔和(he)(he)耳甲(jia)艇，從解(jie)剖學來講(jiang)，也叫(jiao)耳甲(jia)式助(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)。其外殼是(shi)根據聽(ting)(ting)(ting)障(zhang)者的耳甲(jia)腔形狀定(ding)制(zhi)的，麥克風、放(fang)大器(qi)(qi)(qi)和(he)(he)耳機全部(bu)(bu)放(fang)在定(ding)制(zhi)的外殼內(nei)(nei)(nei)，外部(bu)(bu)不需要任何導(dao)線(xian)和(he)(he)軟管(guan)，能(neng)全部(bu)(bu)放(fang)在耳甲(jia)艇、耳甲(jia)腔和(he)(he)外耳道內(nei)(nei)(nei)，比(bi)(bi)較隱蔽(bi)輕便。此類助(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)的麥克風入口(kou)位于助(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)外側面，比(bi)(bi)起耳背式助(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)更符(fu)合人耳感(gan)受聲(sheng)音的自然(ran)位置，耳內(nei)(nei)(nei)式助(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)體積和(he)(he)面板(ban)面積相對較大，使雙麥克風技術較易(yi)得到應用。