A boom microphone is a long and extendable microphone that is attached to a pole or an arm. It is used in film or TV production to capture clear sound from actors who are far away or moving around. Full definition
Included is a detachable boom microphone with a flex goose neck, allowing you to adjust and manipulate it exactly how and what distance from your mouth as you desire. (xboxaddict.com)
The big boom microphone is of a pull down design, with a flexible end so that you can position the microphone closer to your mouth..... (funkykit.com)
Pro-G advanced audio drivers and a noise - cancelling boom microphone with micro-pop filter make voice comms loud and clear. (amazon.com)