microphone

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.

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[…]

To put one or more microphones on or in.