speaking tube

1. 1.

   a tube for conveying the sound of a voice from one room to another

   Broadertube

Questions about speaking tube

What does speaking tube mean?

speaking tube means "a tube for conveying the sound of a voice from one room to another".

Is speaking tube a common word?

speaking tube is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.