Not really stereophonic, because earphones were used instead of loudspeakers. Aural crosstalk is a significant component in stereo reproduction. The stereo effect relies on certain cues that our ear-brain system can interpret. Spacing of the microphones Small, but important differencies exist between the signals in the two channels. These differencies are key to the stereo effect.
Sound arrives at both microphones at the same instant and with equal intensity.
Centered phantom image between the loudspeakers. Increasing the relative level of the rigth loudspeaker by 5 dB shifts the image slightly away from the centerline in the direction of the louder speaker. Increasing the relative signal level of the rigth loudspeaker by 10 dB shifts the image still more toward the louder speaker. Increasing the relative signal level of the rigth loudspeaker by 20 dB shifts the perceived image completely to the right loudspeaker. Intensity differencies between the two ears are significant at high frequencies, but neglible at bass frequencies.