microphone

Etymology

From micro- + -phone.

noun

1. A device (transducer) used to convert sound waves into a varying electric current; normally fed into an amplifier and either recorded or transmitted over radio.
   Behind the tangled garden of microphones that had sprouted on the lectern, Goldwater spoke softly and casually about his family. 1965, Charles McDowell, Campaign Fever: The National Folk Festival, from New Hampshire to November, 1964, Morrow, page 11
   It rained hard through most of Roosevelt's Second Inaugural. Audio tape recordings of the speech feature the tattoo of the rain on Roosevelt's microphone[…] 1994, High Definition Television: An Annotated Multidisciplinary Bibliography, 1981-1992, page 112

verb

1. (transitive) To put one or more microphones on or in.