Coincident Microphone

Microphones are said to be coincident when two (or more) capsules are configured or mounted to receive the sound simultaneously. In praxis, there may be a small distance between the microphones (mm) due to the size of the capsules or housing. Also, the (virtual) acoustic center of the microphone may not fall in the plane of the diaphragm and may even move with direction.

However, if two microphones are on top of each other, the microphones can be arranged to coincide in the horizontal plane over a wider part of the frequency range.