DICT.TW Dictionary Taiwan

 Speak·ing, a.
 1. Uttering speech; used for conveying speech; as, man is a speaking animal; a speaking tube.
 2. Seeming to be capable of speech; hence, lifelike; as, a speaking likeness.
 A speaking acquaintance, a slight acquaintance with a person, or one which merely permits the exchange of salutations and remarks on indifferent subjects.
 Speaking trumpet, an instrument somewhat resembling a trumpet, by which the sound of the human voice may be so intensified as to be conveyed to a great distance.
 Speaking tube, a tube for conveying speech, especially from one room to another at a distance.
 To be on speaking terms, to be slightly acquainted.

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