This directional effect is intended to interact with the room acoustics to add interest to the sound, in much the same way as an acoustic guitarist may swing the box around on a final sustain, or the rotating baffle of a Leslie speaker will spin the sound around the room.
42.
The use of a wireless microphone placed next to the speaker helps to reduce the effects of reverberation from poor room acoustics, bypasses the sounds between the speaker and the listener, eliminates the background noise by the listener, and by using a directional microphone reduces the background noise by the speaker.
43.
When used to record a soloist or small musical ensemble along with the room acoustics, a boundary microphone prevents phase interference between direct and reflected sound, resulting in a natural sound with a flatter frequency response than can be obtained with a stand-mounted microphone at the same distance ( explanation below ).
