Microphone practice
There are a number of well-developed microphone techniques used for recording musical, film, or voice sources or picking up sounds as part of sound reinforcement systems. The choice of technique depends on a number of factors, including: The wish to capture or avoid the collection of extraneous noise. This can be a concern, especially in amplified performances, where audio feedback can be a significant problem. Alternatively, it can be a desired outcome, in situations where ambient noise is useful (hall reverberation, audience reactions such as cheering). Degree of directionality of pickup: in some settings, such as a home video of a birthday party, the person may wish to pick up all the sounds in the room, which would make an omnidirectional mic desirable. However, if a TV news crew is filming a reporter at a noisy protest, they may only wish to pick up her voice, making a cardioid mic more desirable. Choice of a signal type: Mono, stereo or multi-channel. Type of sound-source: Acoustic instruments produce a sound very different from amplified electric instruments, which are again different from the human voice. Sound pressure levels: a mic that is recording Baroque lute will not face high sound pressure levels,