Interference is the phenomenon of amplification of oscillations at some points in space and weakening of oscillations at other points as a result of the superposition of two or more waves arriving at these points. Wave interference is possible if the phase difference of the waves is constant in time, i.e., the waves are coherent. Wave interference is valid for waves of any nature and frequency.
When recording from several microphones, it is necessary to take care of their phasing: the signals from the microphones should not fall into the recording path in the opposite phase, since this can lead to their mutual compensation up to the complete disappearance. Without noticeable distortion of the timbre caused by interference of direct and reflected signals, the microphone can be brought closer to any reflecting surface at a distance of at least 1-1.5 m. Continue reading