耳(er)(er)內(nei)式(shi)(shi)助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)(in-the-ear,ITE),也稱為耳(er)(er)甲腔(qiang)式(shi)(shi)助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)。耳(er)(er)內(nei)式(shi)(shi)助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)是最(zui)早開發應用(yong)(yong)的(de)定制(zhi)式(shi)(shi)助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)。它(ta)占(zhan)據(ju)耳(er)(er)甲腔(qiang)和(he)耳(er)(er)甲艇(ting),從解剖學來講,也叫(jiao)耳(er)(er)甲式(shi)(shi)助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)。其外(wai)(wai)殼是根據(ju)聽(ting)(ting)(ting)障者的(de)耳(er)(er)甲腔(qiang)形狀定制(zhi)的(de),麥克(ke)風、放(fang)大器(qi)(qi)(qi)和(he)耳(er)(er)機全(quan)(quan)部放(fang)在定制(zhi)的(de)外(wai)(wai)殼內(nei),外(wai)(wai)部不(bu)需要任何導線和(he)軟(ruan)管,能(neng)全(quan)(quan)部放(fang)在耳(er)(er)甲艇(ting)、耳(er)(er)甲腔(qiang)和(he)外(wai)(wai)耳(er)(er)道內(nei),比(bi)較隱蔽輕便。此類助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)的(de)麥克(ke)風入口(kou)位于助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)外(wai)(wai)側面(mian),比(bi)起耳(er)(er)背式(shi)(shi)助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)更符(fu)合人耳(er)(er)感(gan)受(shou)聲音的(de)自然位置,耳(er)(er)內(nei)式(shi)(shi)助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)體積(ji)(ji)和(he)面(mian)板面(mian)積(ji)(ji)相對較大,使雙麥克(ke)風技術較易得到應用(yong)(yong)。