• (a.) Of or pert. to a microphone; serving to intensify weak sounds.
(mi″kro-fon´ik) serving to amplify sound. cochlear microphonic.
Mi`cro·phon'ic adjective Of or pert. to a microphone; serving to intensify weak sounds. 
microphone, microphonic An instrument whereby sound waves are caused to generate or modulate an electric current usually for the purpose of transmitting or recording speech or music.