耳(er)(er)內(nei)式(shi)(shi)(shi)助(zhu)(zhu)(zhu)聽(ting)器(qi)(qi)(qi)(qi)(qi)（in-the-ear，ITE），也稱為耳(er)(er)甲(jia)腔(qiang)式(shi)(shi)(shi)助(zhu)(zhu)(zhu)聽(ting)器(qi)(qi)(qi)(qi)(qi)。耳(er)(er)內(nei)式(shi)(shi)(shi)助(zhu)(zhu)(zhu)聽(ting)器(qi)(qi)(qi)(qi)(qi)是最早開發應用(yong)的定(ding)(ding)制式(shi)(shi)(shi)助(zhu)(zhu)(zhu)聽(ting)器(qi)(qi)(qi)(qi)(qi)。它占(zhan)據(ju)耳(er)(er)甲(jia)腔(qiang)和(he)耳(er)(er)甲(jia)艇，從解剖(pou)學來講(jiang)，也叫耳(er)(er)甲(jia)式(shi)(shi)(shi)助(zhu)(zhu)(zhu)聽(ting)器(qi)(qi)(qi)(qi)(qi)。其(qi)外(wai)殼是根據(ju)聽(ting)障(zhang)者(zhe)的耳(er)(er)甲(jia)腔(qiang)形狀定(ding)(ding)制的，麥克風、放(fang)大(da)器(qi)(qi)(qi)(qi)(qi)和(he)耳(er)(er)機全部(bu)放(fang)在定(ding)(ding)制的外(wai)殼內(nei)，外(wai)部(bu)不需要任(ren)何(he)導線(xian)和(he)軟(ruan)管，能全部(bu)放(fang)在耳(er)(er)甲(jia)艇、耳(er)(er)甲(jia)腔(qiang)和(he)外(wai)耳(er)(er)道內(nei)，比較(jiao)隱蔽(bi)輕便。此類助(zhu)(zhu)(zhu)聽(ting)器(qi)(qi)(qi)(qi)(qi)的麥克風入(ru)口位于助(zhu)(zhu)(zhu)聽(ting)器(qi)(qi)(qi)(qi)(qi)外(wai)側面(mian)，比起(qi)耳(er)(er)背(bei)式(shi)(shi)(shi)助(zhu)(zhu)(zhu)聽(ting)器(qi)(qi)(qi)(qi)(qi)更(geng)符合人(ren)耳(er)(er)感受聲音的自(zi)然位置，耳(er)(er)內(nei)式(shi)(shi)(shi)助(zhu)(zhu)(zhu)聽(ting)器(qi)(qi)(qi)(qi)(qi)體積和(he)面(mian)板面(mian)積相對(dui)較(jiao)大(da)，使雙麥克風技術較(jiao)易得到應用(yong)。