C2 adjective, noun /ˈɡreɪtɪŋ/
grating
耳障りな音 / 金属の格子
Meaning
Harsh and unpleasant to the senses, especially sound; a framework of bars covering an opening.
Example
The teacher's grating voice made it hard to concentrate.
先生の耳障りな声で集中するのが難しかった。