送そう話わ器き

noun

telephone transmitter; mouthpiece

Technical term for the part of a telephone that converts sound into electrical signals; often contrasted with 受話器 (receiver).

• 古ふるい電でん話わ機きでは、送そう話わ器きと受じゅ話わ器きが別べつ々べつになっている。

  On old telephones, the transmitter and receiver are separate.

• 送そう話わ器きに向むかって話はなすと、声こえが電でん気き信しん号ごうに変かわる。

  When you speak into the mouthpiece, your voice is converted into electrical signals.