イヤーモニター

noun

in-ear monitor; IEM

Wasei-eigo from 'ear monitor'. Refers to the personal monitoring device used by musicians on stage.

wasei-eigo (Japanese-coined English), from ear monitor

• ライブでは、ボーカリストはイヤーモニターを使つかって自じ分ぶんの声こえを確かく認にんする。

  During live performances, vocalists use in-ear monitors to check their own voice.