In any production, a microphone is necessary for the sound to be effective. It is one of the most crucial parts in any film, production, performance, etc. Microphones have evolved tremendously. Selecting a mic is always based on the situation. On-camera mics are visible to the viewer and off-camera mics aren’t.
Hand held mics is an example of an on-camera mic and they’re fairly tricky. They’re used out in the field in reporting and performing. Performers like Beyoncé use mics with a durable element, like a dynamic mic. The fact that she can sing and dance while holding a mic proves she’s been doing this long enough. The video below displays the live mic feed from her performance at the Grammys.
An inexperienced performer should learn a thing or two about holding a mic. It’s always best to keep it at a distance from your mouth when performing.
Lavaliere mics is another example of an on-camera mic. They’re extremely sensitive and fragile because of how thin the cables are. It’s usually pinned to articles of clothing and used for on-camera interviews. It’s generally better to use since it’s hands free and doesn’t restrict the mobility of a reporter.
Boom mics are off-camera mics. They’re kind of like heavy fishing poles. You have to aim at the subject’s mouth and move slowly. I was walking by a production set one day on the campus of Georgia State and I had the opportunity to be in a commercial a company was shooting. They used a boom mic but also had a prop mic because it was hard shooting it in such a confined space.