耳(er)(er)內式(shi)(shi)助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)(qi)(in-the-ear,ITE),也(ye)稱為耳(er)(er)甲腔(qiang)式(shi)(shi)助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)(qi)。耳(er)(er)內式(shi)(shi)助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)(qi)是(shi)最早(zao)開發應用的(de)(de)(de)定(ding)制式(shi)(shi)助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)(qi)。它(ta)占據耳(er)(er)甲腔(qiang)和(he)耳(er)(er)甲艇,從解剖(pou)學來講,也(ye)叫耳(er)(er)甲式(shi)(shi)助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)(qi)。其(qi)外(wai)殼是(shi)根據聽(ting)(ting)(ting)(ting)障者的(de)(de)(de)耳(er)(er)甲腔(qiang)形(xing)狀定(ding)制的(de)(de)(de),麥(mai)克風、放大器(qi)(qi)(qi)(qi)和(he)耳(er)(er)機(ji)全部放在定(ding)制的(de)(de)(de)外(wai)殼內,外(wai)部不(bu)需要任何導線和(he)軟管,能(neng)全部放在耳(er)(er)甲艇、耳(er)(er)甲腔(qiang)和(he)外(wai)耳(er)(er)道內,比較(jiao)隱(yin)蔽輕便。此類助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)(qi)的(de)(de)(de)麥(mai)克風入(ru)口位(wei)于助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)(qi)外(wai)側(ce)面(mian),比起(qi)耳(er)(er)背(bei)式(shi)(shi)助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)(qi)更符合(he)人耳(er)(er)感(gan)受聲音的(de)(de)(de)自(zi)然位(wei)置,耳(er)(er)內式(shi)(shi)助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)(qi)體積(ji)和(he)面(mian)板(ban)面(mian)積(ji)相對較(jiao)大,使雙麥(mai)克風技術(shu)較(jiao)易得(de)到應用。