In-head localization problem is one of the major issues in 3D sound rendering. Several perceptual cues including pinna cue, reverberation cue and head movement cue are suggested to externalize the in-head localized sound images, but they all failed it convincingly.
This paper suggests a new perspective on the sound image externalization problem. We correlates in-head localization with ‘Interaural cross-correlation coefficient’ (IACC), which is the subjective parameter on spaciousness of the concert hall in architectural acoustics. The subjective test was conducted using several recorded sounds which have different IACC values to evaluate the correlation between sound image externalization and Interaural cross-correlation.