noun
ear protector
A device worn over the ears to protect them from cold, noise, or impact. Common in sports and industrial contexts.
寒い日にイヤプロテクターを付けて外に出た。
I went outside wearing ear protectors on a cold day.
射撃場ではイヤプロテクターの着用が義務付けられている。
Wearing ear protectors is mandatory at the shooting range.