イヤーピース

noun

earpiece

General term for any small device worn in or on the ear, such as for hearing aids, communication devices, or earphones.

• 補ほ聴ちょう器きのイヤーピースを交こう換かんした。

  I replaced the earpiece of my hearing aid.

noun

eartip; ear tip

Specifically the soft silicone or foam tip that goes into the ear canal on in-ear headphones or earphones.

• イヤーピースのサイズが合あわないと音おと漏もれする。

  If the eartip size doesn't fit, sound leaks out.