Definition of speaking trumpet in English:

speaking trumpet

noun

historical
  • An instrument for making the voice carry, especially at sea.

    • ‘The speaking trumpet dates back to the days of the hand drawn and hand operated fire engines.’
    • ‘The apparatus employed consisted of a musket, to the muzzle of which a speaking trumpet had been attached.’
    • ‘The speaking trumpets were sometimes used for shouting insults at rival parties.’
    • ‘Pictures of the speaking trumpet can be seen in many paintings of the period.’