(FILMING) [noun] [C] - (in television or film-making) a long movable pole that has a microphone on one end and is held over the actors so that it cannot be seen by the viewersSound recording is supervised by the floor mixer, while the boom operator positions the microphone during shooting.
BOOM
Meaning of BOOM in English
Cambridge English vocab. Кембриджский английский словарь. 2012