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. Time effects Spatial cues are perceived at lower frequency by the relative time of arrival of the signal at the ears.
Sound arrives at both microphones at the same instant and with equal intensity.
Centered phantom image between the loudspeakers. Delaying the sound in the rigth loudspeaker by 0.2 ms shifts the phantom image slightly toward the left louder speaker. Delaying the sound in the rigth loudspeaker by 0.5 ms shifts the phantomimage still more toward the left louder speaker. Delaying the sound in the rigth loudspeaker by 2 ms shifts the phantom image completely to the left louder speaker. Binaural unmasking Binaural interactions are important, because the stereophonic illusion depends on the differencies of sounds falling on the ears.