振しん動どう板ばん

noun

diaphragm (speaker, microphone, etc.)

Refers to the vibrating membrane in audio devices that produces or captures sound.

• スピーカーの振しん動どう板ばんが破やぶれて音おとが歪ゆがんでいる。

  The speaker's diaphragm is torn, so the sound is distorted.

noun

trembler (electrical component)

Technical term in electrical engineering for a vibrating contact or interrupter, less common than sense 1.

• 古ふるいラジオの振しん動どう板ばんが故こ障しょうして火ひ花ばなが出でた。

  The trembler in the old radio malfunctioned and produced sparks.