1877 J. Cook 107 What analogy does the Telephone transmitter bear to the human tympanum?
1917 July 3/1 Each actor is equipped with a tiny wireless telephone transmitter, and his speech is sent through the ether by ‘radio’ to a receiving station.
2005 R. L. Freeman (ed. 2) v. 93 An acoustic pressure wave is set up, reproducing..the original sound wave from the distant telephone transmitter.